Question

explain that normal reaction force is not always directed upward with the help of an example ​

Answer 1

In this case, the normal force and weight need to be equal in magnitude to explain why there is no upward acceleration of the object. For example, a ball that bounces upwards accelerates upwards because the normal force acting on the ball is larger in magnitude than the weight of the ball.

Answer 2

Answer:

i know the answer but i am doing some other work right now ,so will edit the answer in some time