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An athlete completes one round of a circular track of radius R in 20 seconds. What will be his displacement at the end of 2 minutes 20 seconds?

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Important Questions on Kinematics

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Conceptual Questions)>Q 42
A man walks for some time t with velocity v due east. Then he walks for the same time t with velocity v due north. The average velocity of the man is:
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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Conceptual Questions)>Q 43
A drunkard is walking along a straight road. He takes 5 steps forward and 3 steps backwards, followed by 5 steps forward and 3 steps backwards and so on. Each step is one meter long and takes one second. There is a pit on the road 11 meters away from the starting point. The drunkard will fall into the pit after:
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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Conceptual Questions)>Q 44
A car runs at constant speed on a circular track of radius 10 m taking 6.28 s on each lap (i.e. round). The average speed and average velocity for each complete lap is:
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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Conceptual Questions)>Q 45
A particle moving in a straight line covers half the distance with a speed of 12 m s-1. The other half of the distance is covered in two equal time intervals with speed of 4.5 m s-1 and 7.5 m s-1 respectively. The average speed of the particle during this motion is:
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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Conceptual Questions)>Q 46
The magnitude of average, velocity is equal to the average speed when a particle moves
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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Conceptual Questions)>Q 47
A body covers one-third of the distance with a velocity v1 the second one-third of the distance with a velocity v2, and the last one-third of the distance with a velocity v3. The average velocity is:
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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Conceptual Questions)>Q 48
A car travels a distance d on a straight road in two hours and then returns to the starting point in the next three hours. Its average speed is:
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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Conceptual Questions)>Q 49
A train covers the first half of the distance between two stations with a speed of 40 km h-1 and the other half with 60 km h-1. Then its average speed is: