If an object is moving at a constant speed in one direction, what is needed to change its speed or direction?

1 Answer
Daniel L.
Sep 24, 2016

A force is required to change a speed or direction of movement.

Explanation:

According to Newton's First Law of Motion if no force is applied to the body it either stays in rest or moves with constant speed at a constant direction.

According to Newton's second Law of Motion the force applied to a body implies the acceleration. Its value can be calculated as:

#vec(a)=vec(F)/m#

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