a ball is swung in a vertical circle at the end of a string. Assuming that the total energy in the ball-earth system remains constant, show that the tension in the string at the bottom is greater than the tension at the top by 6 times the weight of the ball. Note that the radius of the circle does not affect this answer

An artificial satellite circles the earth in a circular orbit at a location where the acceleration due to gravity is 6.03 m/s^2. determine the orbital period of the satellite.

The energy equivalent of the rest mass of an electron is

Abaseball is thrown from the outfield toward the catcher. when the ball reaches its highest point, which statement is true? (a)its velocity is not zero, but its acceleration is zero. (b) its velocity and its acceleration are both zero. (c) its velocity is perpendicular to its acceleration. (d) its acceleration depends on the angle at which the ball was thrown. (e) none of the above statements are true.