PHYCICS HELP PLEACE 5 QUESTIONS 30POINTS


1) A car starts from a resting position and accelerates at a constant rate of 6 meters per second per second. What is the car's speed after it has traveled 250 meters?

A41.7 m/s

B54.8 m/s

C127.3 m/s

D1500 m/s

2) The speed of a boat undergoing constant acceleration increases from 5 meters per second to 15 meters per second over a period of 20 seconds. How far does the boat travel during this time?

A125 m

B150 m

C175 m

D200 m

3) A child throws a penny straight down into a wishing well. The penny's initial speed is 2 m/s. If the penny takes 3 seconds to hit the water, how deep is the well?

A20 m down

B46 m down

C50 m down

D94 m down

4) On Mars a rock falls an unknown vertical distance from a resting position and lands in a crater. If it takes the rock 2.5 seconds to fall, how high is the cliff the rock fell from? Mars' surface gravity is 3.8 m/s2.

A9.5 m

B11.9 m

C15.2 m

D23.8 m

5) On Earth a rock falls an unknown vertical distance from a resting position and lands in a lake. If it takes the rock 2.5 seconds to fall, how high is the cliff that the rock fell from?

A24.5 m

B30.6 m

C38.1 m

D61.3 m