What causes objects to move or stay still?

claim:

evidence:

A force is a push or pull that causes an object to move, change direction, change speed, or stop. Without a force, an object that is moving will continue to move and an object at rest will remain at rest. ... Not all forces cause motion, however. Some forces, like gravity and friction, resist or work against movement.

Explanation:

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length

the electric field is a “force field” around a charged object that illustrates the direction the electric force would push an imaginary