Elective Mathematics

Question 1

1Work done against gravity increases potential energy.

Easy

A. True B. False

Question 2

2The momentum of a 3 kg body moving at 7 m/s is ___ kg m/s.

Easy

Your answer (fill in the blank)

Question 3

3Momentum is conserved in all collisions where no external force acts.

Easy

A. True B. False

Question 4

4In an elastic collision

Easy

A. momentum is lost B. bodies stick together C. kinetic energy is lost D. kinetic energy is conserved

Question 5

5Find the momentum of a 2 kg body moving at 7 m/s.

Easy

A. 14 kg m/s B. 0.2857 kg m/s C. 9 kg m/s D. 49 kg m/s

Question 6

6Doubling the speed of a body doubles its kinetic energy.

Easy

A. True B. False

Question 7

7The momentum of a 9 kg body moving at 7 m/s is ___ kg m/s.

Easy

Your answer (fill in the blank)

Question 8

8Gravitational potential energy is

Easy

A. Fs B. ½mv² C. mgh D. mv

Question 9

9The momentum of a 12 kg body moving at 6 m/s is ___ kg m/s.

Easy

Your answer (fill in the blank)

Question 10

10A force of 40 N moves a body 6 m in the direction of the force. Find the work done.

Easy

A. 240 J B. 6.6667 J C. 480 J D. 46 J