In the Newton’s first law of inertia, it states that when an object is stationary, it will continue to be stationary until outside forces act on it. At the same time, if an object is already in motion, it will continue to be in motion until outside forces act on it.

In the video, a stationary ball is not moving when there are no outside forces acting on it. When an outside force is applied, the ball is put into motion. If there are no other outside forces acting on it, the ball will continue to be in motion forever. Because of gravity, friction, and air resistance, the ball comes to a stop at the end.

 

 

In Newton’s second law of motion, more commonly known as F=ma where F refers to the total force, m is the mass of the object, and a is the acceleration of the object. It can be seen that if all existing forces are unbalanced, the resulting net force will cause acceleration of a mass. The acceleration of an object depends on the net force that acting on an object and mass of the object. As the acting force increased, the acceleration that is acting on an object is decreased. The Fnet (net force) equals mass times acceleration, an acceleration is produced by the Fnet.

In the second video, there are two backpacks which means mass is increased. I used same amount of force to push the cart, and in the second video, the cart did not travel the same distance as the cart in the first video. The two videos show that given the same force is applied, when the mass is different, the acceleration also changes. These videos followed the rule of Newton’s second law of motion. Errors: The ground was not flat, so it might cause an error. Forces that I put might not exactly the same, so it might cause an error. The videos that I used were not filmed well and was not long enough to see the results, so these might cause an error as well.

In Newton’s third law of motion, for every action there is an equal and opposite reaction. When An exerts a force on B, B simultaneously exerts a force equal in magnitude and opposite in direction on A : F_A = −F_B.

In the video, the ball hits the wall. That is the action force. As a result, the wall exerts an equal and opposite force on the ball, causing the ball to bounce back.