Newton's+1st+Law+of+Motion

An object at rest will stay at rest unless acted on by another force. An object in motion will remain in motion unless acted on by another force.



The constant velocity of the baseball creates a dent in the box and causes it to move.

In this experiment you could change:
 * The mass of the box
 * The speed of the ball
 * The mass of the ball

What do you think would happen?

If you changed the mass of the box, it wouldn't slide as far when the ball hits it.

If the ball had more acceleration, it would leave a deeper dent in the box and the box would slide further.

If the mass of the ball was more, it would apply more force on the box, move it, and leave a deeper dent. If you decreased the mass of the ball, the box wouldn't slide as far as a ball with more mass. Also the dent wouldn't be as deep (as a ball with more mass).



This has to do with velocity. The person on the skateboard would get a large bump as well as flung of the skateboard. Because of velocity, it would keep them going, because they expect keep going. This leads us to another situation (also not so nice). The person in the air would keep going if gravity weren't there. But since it is it would apply a force to the person, pulling them downwards.

One thing that could change is that the rock was larger and at the level of the person (basically meaning that it was floating in air). The skateboard, this time, would keep on moving and the person would stop. The force that would act on the skateboard would be the friction, slowing it down until it finally stops. If there weren't any friction, the board might just roll of a cliff and would be destroyed by the gravity. Bwahahaha!