Question

# 1.Two children are riding on a merry-go-round. Child A is at a greater distance from the...

1.Two children are riding on a merry-go-round. Child A is at a greater distance from the axis of rotation than child B. Which child has the larger angular displacement?

A.They have the same zero angular displacement.

B.There is not enough information given to answer the question.

C.Child A

D.Child B

E.They have the same non-zero angular displacement.

2.A cart changes its speed from 90 m/s to 100 m/s in 10 seconds. During this interval its acceleration is

A.1 m/s2.

B.none of the above

C.10 m/s2.

D.zero.

3.A 450-kg sports car accelerates from rest to 100 km/h in 4.80 s. What magnitude force does a 68.0 kg passenger experience during the acceleration?

A.394 N

B.82.0 N

C.311 N

D.342 N

4.A constant force of 20 N is applied to an object of mass 8.0 kg at an angle of 25° with the horizontal. What is the work done by this force on the object if it causes a displacement of 2.0 m along the horizontal direction?

A.0 J

B.17 J

C.36 J

D.19 J

E.40 J

5.A golf ball of mass 0.050 kg is at rest on the tee and has a velocity of 55m/s immediately after being struck. If the club and ball were in contact for 0.81m/s what is the average force exerted on the ball?

A.3.4 kN

B.4.9 kN

C.7.1 kN

D.6.3 kN