Question

1. for every action there is an equal and opposite reaction. which law is this?

law 1
law 2
law 3

1. the amount of matter (how heavy) in an object is measured using?

velocity
p = m x a
speed
mass

Explanation:

• For the first question: Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction.
• For the second question: Mass is a measure of the amount of matter in an object. Weight is force due to gravity ($F = m\times a$, where $a = g$ - acceleration due to gravity). Speed is a measure of how fast an object is moving.

Answer:

• First question: Law 3
• Second question: Mass