Mechanical Aptitude Mechanical Aptitude Forces and Motion Principles 2

Question 1

A 10 kg box is pushed across a frictionless surface with a net force of 20 N. What is its acceleration?

Accepted Answer

2 m/s²

Answer

Newton's second law: a = F/m = 20 N ÷ 10 kg = 2 m/s².

Question 2

Which of the following best describes inertia?

Accepted Answer

The tendency of an object to resist changes in its state of motion

Answer

Inertia is the property of matter that resists any change in velocity, whether at rest or in motion.

Question 3

A car traveling at 60 mph applies its brakes and comes to a stop in 6 seconds. What is the deceleration?

Accepted Answer

10 mph/s

Answer

Deceleration = change in speed ÷ time = 60 mph ÷ 6 s = 10 mph/s.

Question 4

When two equal and opposite forces act on a stationary object, the object will:

Accepted Answer

Remain stationary

Answer

Equal and opposite forces produce a net force of zero, so the object remains in equilibrium.

Question 5

A ball is thrown horizontally from a cliff. Which statement about its motion is correct?

Accepted Answer

Its vertical speed increases due to gravity

Answer

Gravity continuously accelerates the ball downward, so vertical speed increases while horizontal speed remains constant.

Mechanical Aptitude Test Practice Test