Question

complete each sentence.

1. newtons first law is also called the law of
2. force = mass x
3. for every action, there is an and opposite reaction.

word bank
acceleration, inertia, equal
multiple choice
circle the correct answer.

1. what is needed to change the motion of an object?

a. heat b. force c. sound

1. you feel a backward push when you jump off a skateboard. which law is this?

a. first b. second c. third

Explanation:

1. Newton's First Law states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. This property is called inertia.
2. Newton's Second Law is \(F = ma\) (Force = mass × acceleration).
3. Newton's Third Law states that for every action, there is an equal and opposite reaction.

For the multiple - choice questions:

1. According to Newton's laws, a force is needed to change the motion of an object (either change its speed or direction). Heat and sound do not directly change the motion of an object in the context of basic mechanics.
2. When you jump off a skateboard and feel a backward push, it is an example of Newton's Third Law. The action is you pushing on the skateboard, and the reaction is the skateboard pushing back on you.

Answer:

1. inertia
2. acceleration
3. equal

Multiple - choice:

1. B. Force
2. C. Third