2. A force is needed to make an object move. Force : push or pull. 1- ball placed on a table doesn’t move unless a force is applied on it. A force is needed to make an object move. Force : push or pull. 1- ball placed on a table doesn’t move unless a force is applied on it.

3. 2- when a ball is given a push, it moves a short distance and the ball then comes to rest. This is because an opposing force called friction force that acts on the ball. Opposing force acting on the ball

4. 3-If the surface is very smooth, there will be no opposing force acting on the moving ball. The ball will continue to move at the same speed in a straight line. Smooth surface

5. Prepared by : Mrs.:Eman talat