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NEET - Grade 11 - Physics - Gravitation - Importance and Snapshot of Gravitation - Study ref# 712
Introduction: Early in our lives, we become aware of tendency of all material objects to be attracted towards the earth, going uphill is lot more tiring than going downhill and there are many other such phenomena. Historically it was t...
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NEET - Grade 11 - Physics - Motion in a Plane - Importance and Snapshot of Motion In A Plane - Study ref# 703
Introduction: In Motion in a Straight Line chapter we developed the concepts of position, displacement, velocity and acceleration that are needed to describe the motion of an object along a straight line. We found that the directional...
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NEET - Grade 11 - Physics - Motion in a Plane - Importance and Snapshot of Motion In A Plane - Study ref# 704
Following sections must be covered to understand Motion in a Plane: 1. Introduction 2. Scalars and Vectors 3. Multiplications of vectors by real numbers 4. Addition and Subtraction of vectors – graphical methods 5. Resolution of ...
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NEET - Grade 11 - Physics - Motion in a Plane - Target Setup for Motion In A Plane - Study ref# 705
Student requires to achieve the following milestones to get better grip over Motion In A Plane. The milestones / targets are as follows:- Starting Point: Days 0Test TypeAppear on TestTarget TestsScorePractice Test000%Chapter Test...
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NEET - Grade 11 - Physics - System of Particles and Rotational Motion - Importance and Snapshot of System Of Particles And Rotational Motion - Study ref# 710
Introduction: Any real body which we encounter in daily life has a finite size. In dealing with the motion of extended bodies (bodies of finite size) often the idealized model of a particle is inadequate. In this chapter, we shall try ...
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NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 84
A jet plane travelling at the speed of 500 km/h ejects its product of combustion at the speed of 1500 km/h relative to the jet plane. What is the speed of the latter with respect to an observer on the ground? Answer: Suppose velocity of jet plane and...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 152
A body is dropped from the window of a train. Will its time of fall remain the same if the train is stationary, moving with uniform speed or moving with uniform acceleration? Answer: The time of fall in each case will be same.In each case, velocity o...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 153
Can the resultant of two unequal vectors be zero? Answer: The resultant of two equal and opposite vectors be zero.Now, suppose, the angle between two vectors P and Q be α. So, the magnitude of resultant is When  ...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 154
If A is a vector of constant magnitude, then show that are perpendicular to each other. Answer: = constant = constantSo, &nb...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 155
Find the magnitude of vector . And also find angles with x-, y-, z- axes. Answer: Suppose A = .magnitude = A = Suppose, the vector A makes angle with x-, y- and z-axes respectively.So, &n...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 156
Given that, Answer: let angle between A and B is ...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 157
Given that A = , B = . Find the unit vector along A×B. Answer: A×B ...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 158
Find the angle between two vectors A= and B = . Answer: To find the angle between two vectors, we use the formulaA. B = A B ...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 159
If two vectors A= and B = are parallel, then find the values of a and b. Answer: If two vectors are parallel then the ratio of their x-, y-, z- components are equal i.e.So, And ...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 160
If , then show that vectors A and B are perpendicular to each other. Answer: Given that,  ...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 161
Two equal force of magnitude acts on a body with an angle between them. Show that, their resultant bisects the angle . Answer: Suppose the magnitude of two forces are F and FAnd the angle between them is So the resultant is R =&n...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 162
Rain is falling vertically with a speed of m/s. Wind is flowing horizontally with a speed of 2 m/s. In which direction the rain seems to fall and with what velocity? Answer: Velocity of rain is Velocity of wind ...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 163
Two boats are crossing a rives of width 800 m with speed 8 km/h. Velocity of river is 5 km/h. one of them crosses with minimum distance and other crosses with minimum time. Find the separation of time to cross the river if they start together. Answer...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 164
Rain is falling vertically down with velocity 4 km/h. A person is walking on a horizontal road with 3 km/h. Find the magnitude of velocity and direction of rain with respect to the person. Answer: Velocity of rain is km/hAnd velocity of th...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 165
A ship is moving due west at speed 40 km/h. another ship is moving with 30 km/h due south. Find the relative velocity of the second sheep with respect to the first one. Answer: Velocity of first ship is Velocity of second ship is So, relati...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 166
Two particles are dropped from top of a tower with an interval of 2 sec. Find the relative velocity and relative acceleration of the particles. Gravitational acceleration is g m/s2 Answer: When the first particle moves downward by 2 sec, the second p...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 167
Derive the equation of motion of a particle which is projected with velocity u and at an angle with horizontal. Answer: Suppose that, the particle is launched with velocity u that makes angle with the x-axis. So, compo...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 168
If two particles are projected at an angle , then find the ratio of their range. Answer: Range of a projectile is given by, R Where u is the projectile velocity of the particleand is the angle of projection with x-axisso, R1...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 169
Water is spreading around a water-fountain on a floor. Find the area of wet surface around the fountain if water emerges with velocity v making an angle 45 with the floor. Answer: Horizontal range of water is R So, area of th...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 170
Range of a particle projected with same velocity and with two different angle is same. are the time of flight for these two projectile. Then find the relation between R, . Answer: Suppose the velocity of projection of two projectile i...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 171
A stone is projected with 28 m/s at an angle with the ground. Find (a) the maximum height the stone will reach and (b) the range of the stone. Answer: (a) Maximum height the stone will reach is &nb...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 172
A ball is thrown horizontally with 18 m/s from the top of a mountain. If the ball touches the ground at 90 m away from the bottom of mountain, then find the height of the mountain. Answer: Here the horizontal component of velocity is = 18 ...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 173
Two stones are dropped together from top of a tower. First stone is dropped and second one moves with a horizontal velocity. Explain which one will touch the ground first. Answer: Suppose, height of the tower is hFor first stone, downward velocity is...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 174
If the angle between two vectors increases gradually from , then how does the resultant value change? Answer: Suppose, the resultant of vectors A and B is R. A is along positive x-axis and is fixed, B is rotating co...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 175
If the resultant of two vectors is equal in magnitude with a vector R and perpendicular to R, then find the value of other vector. Answer: one vector is R and suppose the other vector is Q.magnitude of resultant of these two vectors is...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 176
Two forces P = 1 dyne and Q = dyne are perpendicular to each other. Determine the angle between (P+Q) and (P-Q). Answer: Suppose P = And Q = So, (P+Q) = And (P-Q) = the angle between these two vectors is...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 177
When the angle between P and Q is , the value of resultant is . And when the angle is then value of resultant is prove that, . Answer: When angle is , resultant &nbs...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 178
Two vectors and represents two sides of a triangle. Find the angle between these two sides and also the length of third side. Answer: Suppose, A = And B =...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 179
A boat and a motor launch move together from a point making angle with each other. Velocity of motor launch is m times to that of boat. It seems to a passenger of boat that motor launch is moving with angle 45 to the boat. Prove that,...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 180
A steamer is moving due east with velocity u. a second steamer is moving with speed 2u towards north making an angle of with the east. The second one is moving towards north-east with respect to the first steamer. Show that . Answer: ...
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NEET - Grade 11 - Physics - Motion in a Plane - Study ref# 181
The equation of a projectile in vertical plane is and b are constant and x, y are the horizontal and vertical distance respectively from point of projection. Determine the maximum height of projectile and also determine the projection angl...
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NEET - Grade 11 - Physics - Laws of Motion - Study ref# 248
Define (i) angle of friction (ii) coefficient of friction and (iii) angle of repose. Establish a relation between them. Answer: (i) Angle of friction: The angle of friction between any two surfaces in contact is defined as the angle whic...
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NEET - Grade 11 - Physics - Laws of Motion - Study ref# 249
Calculate the amount of work done in moving a body up a rough inclined plane. Answer: Suppose m is the mass of a body that has to be moved up a rough plane AB, inclined to the horizontal at an angle .The various forces involved are:i) Weight ...
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NEET - Grade 11 - Physics - Laws of Motion - Study ref# 253
Derive an expression for acceleration of a body down a rough inclined plane. Answer: When a plane is inclined to the horizontal at an angle , which is greater than the angle of repose, the body placed on the inclined plane slides down with an ac...
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NEET - Grade 11 - Physics - Laws of Motion - Study ref# 254
A body of mass m is released from the top of a rough inclined plane of length l and height h. if f is the force of friction prove that the body will reach the bottom with a velocity Answer: When the body moves down the inclined planeThe acceler...
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NEET - Grade 11 - Physics - Work, Energy and Power - Study ref# 325
Can mechanical energy be negative? What does negative energy signify? Give an example. Answer: As mechanical energy = Kinetic energy + Potential energyFor mechanical energy is negative, potential energy should be negative and magnitude will be g...
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NEET - Grade 11 - Physics - System of Particles and Rotational Motion - Study ref# 405
An isolated particle of mass m is moving in a horizontal (x-y) plane along x-axis at a certain height above the ground. It explodes suddenly into two fragments of masses . An instant later, the smaller fragment is at What is the posit...
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NEET - Grade 11 - Physics - System of Particles and Rotational Motion - Study ref# 411
i) State parallel axis theorem of moment of inertia. ii) Find the moment of inertia of a ring of mass M and radius R about the axis tangent to that ring and resides in the plane of ring. Answer: i) Parallel axis theorem: ...
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NEET - Grade 11 - Physics - System of Particles and Rotational Motion - Study ref# 412
i) State perpendicular axis theorem of moment of inertia. ii) Find the moment of inertia of a circular disc of mass M and radius R about an axis passing through its centre and perpendicular to its plane. Given, moment o...
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NEET - Grade 11 - Physics - System of Particles and Rotational Motion - Study ref# 422
Calculate the kinetic energy of rotation of a circular disc of mass 1 kg and radius 0.2 m rotating about an axis passing through its centre and perpendicular to its plane. The disc is completing rotations per minute. Answer: Here &nbs...
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NEET - Grade 11 - Physics - Gravitation - Study ref# 506
Write down four properties of geostationary satellites? Answer: 1) period of revolution is same as that of the earth’s spinning motion. 2) It moves from west to east with the orbiting velocity about 3.1km/s 3) The...
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