Vocabulary
Forces
Changes in Motion
Motion
Mixed
100
What is an increase in motion?
Acceleration
100
Which force pulls you down a playground slide?
Gravity
100

Ms. Long and Ms. Mantel are pushing a heavy box across the floor? Why type of force are they creating to move the box?

unbalanced

100

Bayron is playing with a soccer ball at the top of a hill. He kicks the ball and it rolls down the hill. What force is making the ball roll down?

Gravity 

100
Joshua and Shanice were moving a bookshelf across the carpet in their classroom. Even though they pushed as hard as they could, the bookshelf would only move a few inches at a time. What happened as they tried to push the bookshelf?
The force of friction opposed the motion of the bookshelf.
200

Mike lifted a heavy box. What force did he have to overcome to move the box upward?

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?

friction and gravity 

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 rolling ball will slow down until it finally stops. What force slows down and stops the ball?
What is friction.
300

Force that causes a change in motion of the object

Unbalanced Force

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 ramp, what should they do?
Increase the force applied to the car.
400

What is a type of force slows or eventually causes an object to stop

Friction

400

Ms. Long's class and Mrs. Phifer'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?

 a balanced force on the rope.

400

A toy car rolling along different surfaces will experience different amounts of friction. A toy car would encounter the most friction when rolling on which surface?

A rough surface (for example: a sandy beach, over grass, over rocks)

400

Yarley kicks the kick ball at recess with more force than she usually does. What will happen to the ball?

More acceleration! It is going to go farther!

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

an object in motion stays in motion; an object at rest stays at rest

Inertia

500

What two forces are acting together to keep a cup balanced on a table?

Gravity and the force of the table holding the cup up.

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
Xiomara roller skates to the top of a hill and then starts rolling downward. What are the MAIN forces affecting Xiomara’s motion as she rolls down the hill?
What are friction and gravity.
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