Vocabulary
Forces
Changes in Motion
Motion
Energy and Motion
100
This is known as stored energy

What is potential energy?

100
Which force pulls you down a playground slide?
Gravity
100

Shawn is driving down a hill and used his brakes to slow down.  What force causes him to slow down.

What is friction?

100
Alix is playing with a soccer ball at the top of a hill. Alix kicks the ball and it rolls down the hill. What happens as the ball rolls?
The force of gravity pulls the ball downhill.
100

Joshua rode on a roller coaster that started with a 50ft hill. Shanice rode on a roller coaster that started with a 75 ft hill. Which roller coaster will have the most kinetic energy?

The roller coaster that Shanice rode (the 75ft) roller coaster. 

200

Mike threw a box in the air What force caused the box to fall back down to the ground?

Gravity

200
The force that works against movement.
Friction
200
Explain why a parachute makes a person falling from a great height fall more slowly?
The parachute causes air resistance, which slows the fall.
200
Sandley started pushing a bookcase across the room.Then, he removed the books and continued pushing with the same force and direction. How does removing the books affect the motion of the bookcase?
The mass is decreased, making the bookcase move faster.
200

A ball is sitting on the top shelf of a bookcase and another ball is sitting on the bottom shelf. Which one has the most potential energy?

What is the ball on the top shelf

300

This is when something is moving. It is described by direction and speed.

What is motion?

300
The type of force which results in movement?
An unbalanced force.
300
Explain why a person standing on the Moon can jump higher than a person standing on Earth.
The Moon's gravitational pull is less than Earth's.
300
Charlene kicked the winning goal in her last soccer game. What force acted between Charlene's foot and the ball to cause the ball to move?
Push
300

Some students apply force to a toy car on a ramp to push it down. The students measure how fast the car rolls down the ramp. If students want to increase the speed of the car down the same ramp, what should they do?

Increase the force applied to the car.

400

What is a type of friction which slows objects moving through air?

What is air resistance?

400

Ms. Starling's class and Ms. Howard's class are playing tug-of-war. After several minutes, the students notice that the rope has not moved at all. What is one possible cause of this?

The two classes have created a balanced force on the rope.

400

A toy car rolling along different surfaces (foil, felt, gravel) will experience different amounts of friction. A toy car would encounter the most friction when rolling on which surface?

What is gravel?

400
Rodrigo and Marcus are moving a dresser. They are arguing about which direction to move it. Rodrigo is pushing the dresser with a force of 5 newtons towards Marcus. Marcus is pushing the dresser towards Rodrigo with a force of 10 newtons. What happens to the dresser?
The dresser moves towards Rodrigo.
400
While on a camping trip, Nadely and Abigail are traveling in a boat on a river. On their trip, the river's current carries them down the river at a speed of 5 meters per second (m/s). They don't need to row because the current is carrying them in the direction they need to go. If no other forces are acting on the boat, describe the motion of the boat as it travels downstream?
It stays the same.
500

This is a force between two surfaces rubbing against each other. It works against the motion of an object.

What is friction?

500

David is needs to push a box up a ramp. Box 1 is 20 kilograms and Box 2 is 35 kilograms. Which box will need more force to move and why?

Box 2 will need more force because it has more mass.

500

A car and a truck travel at the same speed on a road in the same direction. Both vehicles slow down with the same stopping force. Why does the truck need more distance the the car to stop?

The truck has more mass.

500
Which type of force moves an object toward the source of the force?
Pull
500

When does a pendulum have to most potential energy?

When it is raised to one side.

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