Originally Posted by

**Psyche** Would anybody be able to explain this problem and its equations for me? I don't understand it at ALL.

1)A ball is thrown upwards from a 100 m high cliff at 7.5 m/sec. If you ignore air resistance

A) What is its velocity after 7.0 sec?

B) How long until it is at its high point?

C) Where is it (Vertical height related to the ground) after 7.0 sec

D) When does it reach the ground?

E) What is the total distance moved?

F) WHat is the ball's speed just before hitting the ground?

2) A car accelerates uniformly in a straight line from rest at the rate of 2.3 m/s^2. What is the speed of the car after it has traveled 55m. Answer in meters per second.

Please, I really need somebody to explain this to me ASAP. I don't necessarily need the answers, but I NEED the equations! I just don't understand! And none of these are trick questions.