When will the acceleration of a body be opposite to the direction of motion?

Question

This is in prep for a science exam, so a quick answer with example would be appreciated.

thanks a lot!

Answer 1

This happens when the moving body retards(negative acceleration). For eg, when u throw a ball in the upward direction the ball's velocity will slow down and ultimately it will stop moving and then fall down. This is because of retardation

Answer 2

when breaks are applied or when a body is thrown vertically upward direction

Answer 3

when the object is slowing down for example a car is going forward,but is slowing down , therefore the acceleration is negative

Answer 4

during  retardation i.e when a body is movin n u apply a force opposite to its motin  the body will slow down n then the final velocity wil be zero

Answer 5

When a force is applied opposite to the direction of motion, the velocity decreases and hence the acceleration is opposite to the direction of motion or negative, which is called retardation.

Eg. When a ball in motion is stopped by a force such as your hands, then the acceleration is negative.

I'm not so sure about it so confirm this answer from somewhere else too.

:):)

Answer 6

This kind of a case is possible if we throw up an object, like ball, upwards in the sky, so, when it would move against the force of gravity, it's motion would be in opposite direction as that of the acceleration. the body in such a case would be retarding by 9.8m/s by second.

other cases can be when a body moves on a straight line path, and applies brakes to r****d. this will also be a question in which the motion of the body would be opposite to that of acceleration.

Hope you will rate as the best answer!!