An arrow is fired downward at an angle of 45 degrees from the top of a 200 m cliff with a velocity of 60.0 m/s. How long will it take the arrow to hit the ground?

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

Match each scenario to the form of energy it represents

Suppose astronomers built a 140-meter telescope. how much greater would its light-collecting area be than that of the 10-meter keck telescope? express your answer using two sign