Consider the video demonstration that you just watched. A more complete explanation of what you saw will be possible after covering Newton's laws. For now, consider the following question: How would the result of this experiment change if we replaced the ball with another one that had half the mass

The second law is given by

F = m a

Explanation:

Newton's second law is the real law.

It shows that the force acting on the object is directly proportional to the rate of change of momentum of the body.

F = m (v - u) / t

F = m a

where, m is the mass of the body, a is the acceleration, v is the final velocity and u is the initial velocity.

If the mass is halved and to keep the force same the acceleration is doubled.

it is called kinetic energy