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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... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Importance and Snapshot of Motion In A Straight Line - Study ref# 700

Introduction: Motion is common to everything in the universe. We walk, run and ride a bicycle. Motion is change in position of an object with time. In this chapter, we shall learn how to describe motion. For this, we develop the concep... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Importance and Snapshot of Motion In A Straight Line - Study ref# 701

Following sections must be covered to understand Motion in a Straight Line: 1. Introduction 2. Position, path length and displacement 3. Average velocity and average speed 4. Instantaneous velocity and speed 5. Acceleration 6.... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Target Setup for Motion In A Straight Line - Study ref# 702

Student requires to achieve the following milestones to get better grip over Motion In A Straight Line. The milestones / targets are as follows:- Starting Point: Days 0Test TypeAppear on TestTarget TestsScorePractice Test000%Chap... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 70

A ball is thrown vertically upward with a velocity of 20 m/s. Construct time–acceleration and time-displacement graph. Answer: Initial velocity   Acceleration  because, acceleration is downward. Time to reach max. height... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 71

Two parallel rail tracks run north-south. Train A moves due north with a speed of 54 km/h and train B moves due south with a speed of 90 km/h. What is the relative velocity of B with respect to A in m/s? Answer: VA = 54 km/hr VB = 90 k... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 72

The displacement (in meter) of a particle moving along x-axis is given by .Calculate:1. The instantaneous velocity at t = 2s2. Average velocity between t = 2s and t = 3s,3. Instantaneous acceleration. Answer: 1.  At,  &nbs... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 73

Suppose two straight lines are drawn at angle  with time axis in the same displacement- time graph. Which straight line determines larger velocity? And find the ratio of their velocities. Answer: In displacement-time graph,  The veloci... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 74

A body is thrown up with a velocity of . Find how high will it rises and how much time will it take to return to its point of projection. Answer: Let the point of projection O be taken as the origin.At t = 0, v(0) = 78.4 ms-1 Let t be the t... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 75

A car moving along a straight highway with speed of 126 km/h is brought to a stop within a distance of 200m. What is the retardation of the car (assumed uniform) and how long does it take for the car to stop? Answer: Initial speed of the car, &n... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 76

‘Displacement cannot be always equal to the distance traversed’ – explain it with example. Answer: Distance is the total path traversed by the particle but displacement is the shortest distance between the initial position and final position of motio... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 77

Establish the relation  graphically. Answer: Slope of v-t graph is constant. So there is uniform acceleration. Area below the graph gives the displacement (x).Area = Area of trapezium  Since  We have,  ... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 79

Define Instantaneous velocity. Answer: Velocity of body at a particular instant is called Instantaneous velocity. or,  ... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 82

A train moves from one station to other station with a velocity 40 km/h and returns to the first station with velocity 60 km/h. Find average speed and average velocity of the train. Answer: Suppose, the distance between the stations is  cm.... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 83

Find the average speed and average velocity of a particle moving a half circle of radius  in time. Answer: Here, total distance travelled in time t is =   Here, displacement =  ... read more

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... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 85

A cricketer hits a ball coming towards south with a velocity 30 m/s and gives it a velocity 20 m/s towards north. Find the change in velocity. Find also the acceleration if the time of contact is 0.02 sec. Answer: Here, initial velocity is  ... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 86

The distance travelled by a particle in time t is given by  the average speed of the particle during the time 0 to 5 sec, and (b) the instantaneous speed at t = 4 sec. Answer: (a)    The distance travelled during time 0 ... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 87

A particle starts to fall from the highest point of a vertical circle along any one chord of that circle. Show that, the time required to reach the other end of the chord is independent of the length of the chord. Answer: Suppose, the radius of the c... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 88

Displacement and time t of a particle is related by the equation . After how much time the particle stops for a moment? Answer: When the particle stops, its velocity becomes zero So,    By condition,  So, ... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 89

A stone is dropped from the top of a tower of height 400 m. at the same instant another stone is thrown upward with velocity 100 m/s. when and where of their path will they meet?  Answer: Suppose, after time t and at a distance h from the top of... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 90

Two particles of mass  are dropped from height a and b respectively. Find the ratio of their time to reach ground. Answer: For particle of mass ,               ... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 91

A particle moves with a velocity . Find the distance travelled by the particle. Answer: Velocity of the particle at time t is The velocity-time graph of the particle is given below  Now, distance travelled by the particle in time ... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 92

A train was moving with a speed 54 km/h. It applies break and comes to rest within 1 min. Find (a) the retardation and (b) the distance covered before come to rest. Answer: Initial velocity   Final velocity   = 0 Time&nb... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 93

Derive the relation  graphically. Symbols have their usual meaning. Answer:  ... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 94

A bullet travelling with a velocity of 16 m/s penetrates a tree trunk and comes to rest in 0.4m. Find the time taken during the retardation. Answer: Initial velocity  Distance d = 0.4 m Final velocity  Retardation = &nbs... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 95

Retardation of a particle moving along a straight line is , where the velocity of the particle at time t is  and c is any positive constant. If the initial velocity of the particle is u then show that . Answer: Here the retardatio... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 96

A particle is dropped from a building of height 400m. How much distance will it cover in the last sec of its journey? (given g = 9.8 ms-2) Answer: Initial velocity Acceleration = Height  Now, from equation    &... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 97

A man walks on a straight road from his home to a market 2.5 km away with a speed of 5 km/h. finding the market closed, he instantly turns and walk back home with a speed of 7.5 km/h. What is the(a) Magnitude of average velocity, and(b) Ave... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 98

Give an example of uniform speed but different acceleration. Answer: When a particle moves along a circular path with uniform speed, then its speed is uniform. The acceleration of the particle is centripetal acceleration, which is directed towards th... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 99

A velocity-time graph of a particle is shown in fig. Find the (a) acceleration of the particle in time 0 to 4.5 sec. (b) total displacement covered by the particle and (c) total distance of the particle.  Answer: (a)    Accel... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 100

A car starts accelerating from rest for sometimes, maintains the velocity for sometimes and then comes to rest with uniform deceleration. Draw the v-t graph. Answer: The particle starts from rest and moves with a constant acceleration upto time t1 an... read more

NEET - Grade 11 - Physics - Motion in a Straight Line - Study ref# 101

A ball is dropped from a height of 90 m on a floor. At each collision with the floor, the ball loses one-tenth of its speed. Plot the speed-time graph of its motion between t=0 to 12 sec. Answer:  in upward direction, so +veTime required to go a... read more

NEET - Grade 11 - Physics - System of Particles and Rotational Motion - Study ref# 406

A particle is moving along a straight line parallel to x-axis with constant velocity. How does the angular momentum of the particle change about the origin? Answer: Suppose a particle of mass m is moving with velocity v parallel to x-axis from B, whe... read more

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