To demonstrate an elastic collision, a teacher places a tennis ball on the floor. She wants to hit the ball so that the followin
g conditions are satisfied. 1. After collision, the tennis ball should roll with the velocity of the ball that hit it
2. At the instant of collision, the ball that hit the tennis ball should stop.
What ball should she use?
Golf ball, tennis ball, basketball, or bowling ball?
If the acceleration due to gravity on the Moon's surface is and the acceleration due to gravity on the Earth is , we can write that:
If the radius of the Moon is and the radius of the Earth is , we can write that:
By Newton's 2nd Law we know that F=ma and using Newton's law of universal gravitation we can calculate the gravitational force an object with mass <em>m</em> experiments from a planet with mass <em>M</em> being at a distance <em>r</em> from it. We will assume our object is on the surface so this distance will be the radius of the planet.
Since the force the object experiments is the force of gravitation we can write, for Earth: