Collision and Friction Multiple Questions and Answers.




6.Calculate the velocity of the bob of a simple pendulum at its mean position if it is able to rise to a vertical height of 10cm. Take g = 9.8m/s2?
A. 5m/s
B. 1.5m/s
C. 14m/s
D. 1.4m/s

7.How high must the body be lifted to gain an amount of potential energy equal to the kinetic energy it has when moving at a speed of 20m/s? g=9.8m/s2?
A. 20m
B. 20.0m
C. 202m
D. 22m

8.A ball is thrown vertically upwards with a velocity of 20m/s. At what height, will its kinetic energy be half its original value?
A. 10.20m
B. 10m
C. 15m
D. 5m

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