Physics questions chapter 2. please answer ASAP

A car slows down uniformly from a speed of 29.0m/s to rest in 7.80s .

How far did it travel in that time?

Answer = 113.1 meters

A stone is thrown vertically upward with a speed of 16.6m/sfrom the edge of a cliff

75.0 m high (Figure 1) .

How much later does it reach the bottom of the cliff? Express your answer to three significant figures and include the appropriate units.

What is its speed just before hitting?

Express your answer to three significant figures and include the appropriate units.

What total distance did it travel?

Express your answer to three significant figures and include the appropriate units.

Answer

Time = 5.96

Speed = 37.9 m/s

Total distance = 103.3 seconds

A world-class sprinter can reach a top speed (of about 11.2m/s ) in the first 18.0m of a race.

What is the average acceleration of this sprinter? 

Acceleration = 3.48 m/s^2

Time = 3.2 s