Question

what will happen when a force is applied on a moving object aginst the direction of motion?
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Answer 1

Answer:

If the force applied on the object is in the direction of its motion, the speed of the object increases. If the force is applied in the direction opposite to the direction of motion, then it results in a decrease in the speed of the object.

Explanation:

hope it will help full for you

Answer 2

Explanation:

The object will accelerate in a direction which is opposite to the force acting so the speed decreases when a force is applied in a direction opposite to the direction of motion of the body. Also, the work done by the force will result negative as the angle between the force and displacement is 180 degree.

W= FscosΘ

Θ here is 180 cos180 is -1 hence work is negative.