Select the correct answer. Amy’s car is placed at the top of the ramp. She releases the car and it rolls to Stop A. What could Amy do to help the car move farther?
add mass to the car.
remove mass from the car.
clap for the car.
paint the car.
Select the correct answer. Which of the cars from the previous question will stop at Stop B?
Amy's car (10 grams)
Sergei's car (14 grams)
Tanisha's car (16 grams)
Dora's car (20 grams)
A tee ball rests on top of a tee. The force of the tee pushing up on the ball is balanced by what force?
The force of gravity.
The force of the bat pushing the ball forward.
The force of the player throwing the ball.
The wind pushing the ball down.
What best describes the direction of Earth's gravitational force?
It pulls objects closer together.
It keeps objects from getting to close.
It pulls objets closer to Earth.
It pulls objects away from the air.
Hanna goes hiking in the forest. She uses a compass. Explain what forces are allowing her to find the correct direction to go? Explain how are these forces working to control the compass?