Science Projects Index

Force

If you bounce a tennis ball, you will find that at times it bounces at different directions. This is because of certain different surface areas on the tennis ball which are made of different materials. These different areas are small but do cause the difference in bounce.

Effect of Acceleration Due To Gravity

Earth exerts the force of gravity on every object on this earth. Any object that can fall free will have an acceleration of 9.8m/s. So it should be understood that all objects will fall to the earth at the same speed and time, if allowed to do so freely.

You can check this by taking a plastic ball and a cricket ball of the same size to the top of your house and let them fall freely at the same time. You will find that both of them reach the ground at the same time.