Answer:
Law of Motion/ Law of Inertia
Explanation:
Objects at rest stay at rest unless you're the one to move it.
Answer:
Everybody tends to keep it's state of rest or motion in straight line with uniform velocity unless an external force acts on the body
Explanation:
To keep the state of the body it must not to be affected by external force
F=0
F1=f2=0
F3=f4=0
