Jason jumps his motorcycle off a 50m tall cliff. How fast does he have to go to land at his target 90 m from the base of the cliff? (assume no air resistance)

Please solve and explain the solution too. Thank you very much!

In the Soapbox Derby in (Figure 1), young participants build non-motorized cars with very low-friction wheels. Cars race by rolling down a hill. Assume that the track begins with a 63-ft-long (1 m = 3.28 ft) section tilted 15 ∘ below horizontal.  Part A: What is the maximum possible acceleration of a car moving down this stretch of track? Express your answer to two significant figures and include the appropriate units. Part B:If a car starts from rest and undergoes this acceleration for the full l, what is its final speed in m/s ? Express your answer using two significant figures.

A paperclip falls to the ground for 8.36 seconds. What is the speed of the paperclip just before it hits the ground? You can assume no air resistance. Round to 1 decimal.    Imagine a ball that is pushed off a desk completely horizontal and falls 9.74 m down to the floor. If it landed 8.56 m away from the edge of the desk, how fast was it moving in the horizontal direction just before it hit the ground? Round to 1 decimal.