Inertia and Force Concepts

Mr. Moore conducts a physics review session covering key concepts such as inertia, net force, equilibrium, and force calculations. He explains how inertia depends solely on mass, discusses equilibrium as a state of balanced forces, and demonstrates how to calculate force and acceleration using given data. The session includes problem-solving examples to reinforce understanding.

What factor does inertia depend on?

• Speed of the object

• Mass of the object

• Shape of the object

• Color of the object

If the mass of an object decreases, what happens to its inertia?

• Inertia remains the same

• Inertia decreases

• Inertia increases

• Inertia becomes zero

What is the net force on an object at rest?

• Zero

• Equal to its mass

• Equal to its weight

• Equal to its acceleration

Which condition represents equilibrium?

• Net force is negative

• Net force is positive

• Net force is equal to mass

• Net force is zero

In a graph representing equilibrium, what is the acceleration?

• Equal to velocity

• Zero

• Positive

• Negative

If two forces of 12 N and 2 N act in opposite directions on a block, what is the net force?

• 14 N

• 10 N

• 12 N

• 2 N

A net force of 25 N is applied to a 10 kg block. What is the acceleration?

• 0.25 m/s²

• 2.5 m/s²

• 10 m/s²

• 25 m/s²

What is the mass of a block if a net force of 10 N results in an acceleration of 2 m/s²?

• 20 kg

• 10 kg

• 5 kg

• 2 kg

An object starts from rest and reaches 20 m/s in 0.1 seconds. What is the acceleration?

• 2 m/s²

• 20 m/s²

• 2000 m/s²

• 200 m/s²

What is the force on a 0.5 kg object accelerating at 2000 m/s²?

• 100 N

• 1000 N

• 200 N

• 2000 N