Physics Quiz 14

What explains why objects resist changes in their state of motion?

• gravity

• inertia

• force

• friction

What is Newton's First Law

• F=ma
• Every action has an equal and opposite reaction
• An object at rest stays at rest, an object in motion stays in motion. 
• Friction 

What is Newton's First Law known as? The Law of

• Friction
• Mass
• Inertia
• Gravity

Newton's second law of motion states that an unbalanced force is equal to mass times:

• acceleration

• force

• motion

• inertia

As more unbalanced force is applied to an object, its acceleration:

• stays the same

• decreases

• increases

Newton's third law of motion states that for every action there is:

• an opposite, but equal reaction.

• an opposite and equal reaction.

• a reaction.

A 20 kg bike accelerates at 10 m/s². What was the force?

• 30 Newtons

• 2 Newtons

• 200 Newtons

• 10 Newtons

A force of 90N is applied to each cart below, which one will accelerate the fastest?

• Cart 1
• Cart 2
• Cart 3 
• Cart 4

What is the force that causes objects to fall to Earth?

• Air resistance
• Gravity
• Water resistance
• Pressure

What is the net force?

• 20 N 
• 0 N 
• 400 N 
• 40 N