Newton's Laws of Motion

How many laws of motion did Isaac Newton theorize?

Newton's first law is known as the law of what?

• Enigma

• Inertia

• Energy

• Intuition

What does Newton's first law state about an object?

• An object at rest tends to stay in motion.

• An object's motion is dependent on its weight.

• An object's speed increases with applied force.

• An object remains at rest unless acted upon by an external force.

According to Newton's second law, it takes less force to an object that is ​ (a)   than/as another object, such as a bicycle and a car.

• lighter
• heavier
• the same weight

What happens according to Newton's third law of motion?

• For every action, there is an equal and opposite reaction.

• Force equals mass times acceleration.

• An object at rest stays at rest.

• Speed of an object decreases with time.

Match these descriptions with the right word.

Groups:

(a) Force

,

(b) Acceleration

,

(c) Motion

• Any action that causes a change in shape

• A change in speed

• A change in position

Match the key concept of each law to its description:

The heavier an object, the more force it needs to move or accelerate. ​ (a)  

Objects remain still or in motion unless a force acts upon them. ​ ​ (b)  

If you exert force on an object, it causes a reaction with equal and opposite force. ​ (c)  

• Amount of Force
• Action and Reaction
• Inertia