A coin and feather are dropped in a moon. what will fall earlier on ground. give reasons. if they are dropped in the earth, which one will fall faster

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little

An element becomes a positively charged ion when itloses protons. loses electrons. gains electrons. gains neutrons.

Aball is thrown from the top of a building with an initial velocity of 21.9 m/s straight upward, at an initial height of 51.6 m above the ground. the ball just misses the edge of the roof on its way down, as shown in the figure. (a) determine the time needed for the ball to reach its maximum height. (b) determine the maximum height. (c) determine the time needed for the ball to return to the height from which it was thrown, and the velocity of the ball at that instant. (d) determine the time needed for the ball to reach the ground. (e) determine the velocity and position of the ball at t = 5.35 s.