Forces Review (Force, Friction, Gravity)

Force is

• the pull of gravity on an object.

• the thing that stops or slows down an object by rubbing against another object.

• the strength of something when it is moving.

• a push or a pull on an object.

Tags

NGSS.MS-PS2-2

Gravity

• pulls objects toward each other.

• stops or slows an object down by rubbing against another object.

• a push or a pull on an object.

• the strength of something when it is moving.

Tags

NGSS.MS-PS2-4

Friction

• pulls objects toward each other.

• stops or slows an object down by rubbing against another object.

• a push or a pull on an object.

• the strength of something when it is moving.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

Which of the following is an example of balanced forces?

• 
• 
• 
• 

Tags

NGSS.3-PS2-1

Which demonstrates more friction, pulling a sled over ice or the grass?

• Pulling a sled over ice demonstrates more friction.

• Pulling a sled over the grass demonstrates more friction.

True or False -

The effects of a force can start an object to move.

• True

• False

Tags

NGSS.MS-PS2-2

A blue car has stopped at a red traffic light. When the light turns green, the car begins to move because

• it had an empty gas tank.

• a force acted on the car causing it to move.

• Obi-Wan Kenobi said, "May the force be with you."

• the driver had to get to school.

Tags

NGSS.MS-PS2-2

Which situation is it better to have a high amount of friction?

• A hockey player is skating across the ice.

• A person is skiing down a mountain of snow.

• A little girl is skating across the wooden floor in her socks during recess.

• A goalie is wearing special gloves to help him catch a soccer ball.

True or False -

A motorcycle goes from 10 miles per hour to 0 miles per hour because a force has acted on it.

• True

• False

Tags

NGSS.MS-PS2-2

Astronaut Jessica takes her 10-pound bowling ball to the moon. What would be a true statement about the mass and weight of the ball.

• The mass of the ball will be less, but the weight of the ball will not change on the moon.

• The mass of the ball will not change, but the weight of the ball will be less on the moon.

• Both the mass and the weight of the ball will be less on the moon.

• Both the mass and the weight of the ball will be more on the moon.