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

Torque = Force × radius = 500 N × 0.4 m = 200 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

Deceleration = Δv / Δt = 4 / 2 = 2 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

Each rope carries half the load: 1,200 / 2 = 600 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

Net force = Car weight − Counterweight = 8,000 − 5,000 = 3,000 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 First Law (inertia) explains that the passenger's body resists the change in motion and appears to be pushed in the opposite direction.

EIAT - Elevator Industry Aptitude Test Practice Test

EIAT - Elevator Industry Aptitude Test Practice Test

EIAT Forces, Torque, and Motion 2