A ball is thrown horizontally from a cliff which is 62.8 meters tall with a horizontal speed of 21.3. Determine the time the ball is in the air. Use g=9.8 m/s^2

The seven sisters, seven stars located more than 400 light-years away in the taurus constellation can be seen here with venus and another constellation, orion. the seven stars stay grouped together but seem to move, like the planet venus. why do stars seem to move like planets in the night sky?

Acaterpillar tries to climb straight up a wall a meter high, but for every 2 cm up it climbs, it slides down 1 cm. eventually, it reaches the top. when it reaches the top, it does not pull itself over so it will slide down 1 cm. what is the total displacement traveled?

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?