EIAT Forces, Torque, and Motion 2

Question 1

A sheave has a radius of 0.4 m and a rope tension of 500 N on one side. What torque does this tension apply to the sheave?

Accepted Answer

200 N·m

Answer

125 N·m

Answer

250 N·m

Answer

400 N·m

Question 2

An elevator car decelerates from 4 m/s to 0 m/s in 2 seconds. What is the magnitude of its deceleration?

Accepted Answer

2 m/s²

Answer

0.5 m/s²

Answer

1 m/s²

Answer

8 m/s²

Question 3

Two ropes support a 1,200 N load equally. What is the tension in each rope?

Accepted Answer

600 N

Answer

300 N

Answer

900 N

Answer

1,200 N

Question 4

A counterweight reduces the net force a motor must lift. If the car weighs 8,000 N and the counterweight is 5,000 N, what net upward force is needed to raise the car?

Accepted Answer

3,000 N

Answer

1,500 N

Answer

5,000 N

Answer

8,000 N

Question 5

Which law of motion explains why a passenger feels pushed backward when an elevator accelerates upward?

Accepted Answer

Newton's First Law

Answer

Newton's Second Law

Answer

Newton's Third Law

Answer

Hooke's Law

Question 6

A motor exerts 600 N·m of torque on a drum of radius 0.3 m. What rope tension does the drum produce?

Accepted Answer

2,000 N

Answer

180 N

Answer

600 N

Answer

1,200 N

Question 7

An object moving in a circle experiences centripetal acceleration directed:

Accepted Answer

Toward the center

Answer

Tangentially to the circle

Answer

Away from the center

Answer

Opposite to the velocity