1. A boy pushes down on a car rolling horizontally down the road. If the boy pushes down vertically with 10 N of force

[answerhappygod]

1. A boy pushes down on a car rolling horizontally
down the road. If the boy pushes down vertically with 10 N of force
as the car rolls 3.0 m horizontally, the amount of work done by the
boy is?
2. A car slows down from 108 km/h to 90 km/h over the
course of 4.0 s. The force of the brakes was 1000 N. What is the
work done by the brakes on the car?
3. A ball is dropped off a high cliff. Which of the
following quantities increases as the ball gets closer to the
ground?
a. kinetic energy
b. acceleration
c. force of gravity
d. all of the choices
e. gravitational potential energy