21. If the velocity of a car increases from 5 meters per second to 10 meters per second in 5 seconds, then what is its acceleration?
22. Two parallel train tracks run from North to South. On one track train A is moving with a speed 30 m/s from North to South. An the other track a train B is moving with speed 50 m/s from South to North. The relative velocity of train A with respect to train B is
23. A particle is moving in a uniform circular motion with constant speed v along a circle of radius r. The acceleration of the particle is
24. A particle moves with uniform acceleration along a straight line from rest. The percentage increase in displacement during 6th compared to that in 5th is about
25. The slope of a distance-time graph shows . . . . . . . .
26. If the distance S covered by a moving car in rectilinear motion with a speed v in time t is given by s = vt, then the car undergoes
27. Which of the following statements is true for Newton's Third Law of Motion.
28. The rate of change of displacement is called-
29. The mechanical gain of lever is
30. Nuclear force is
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