Force

Force can be

• Pushes only

• Pushes and pulls

• Pulls only

A boy rides a skate board down a hill. Eventually the skate board stops. Which is MOST responsible for causing the skateboard to stop?

• gravity acting on the skateboard

• the mass of the skateboard

• the mass of the boy

• friction acting on the skateboard

Tags

NGSS.MS-PS2-2

A book falls off the desk. What moves the book towards the floor?

• mass

• gravity

• friction

• speed

Tags

NGSS.5-PS2-1

What will happen to the book if no other forces act upon it?

• book will stay at rest

• mass of the book will increase

• book will begin to move

• gravity on the book will increase

Tags

NGSS.MS-PS2-2

Mark and Ann were playing kickball. They both kicked the same ball, but noticed that Mark kicked the ball farther than Ann. What most likely caused the difference?

• Mark kicked with less force

• Mark's kick had less friction

• Mark kicked with more force

• The ball had less gravity

Tags

NGSS.MS-PS2-2

A push or a pull on an object is-

• stationary

• a pressure

• it's weight

• a force

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Forces can change the

• slow down or speed up objects only

• movement of objects but only if they were already in motion

• speed, direction or shape of an object

Tags

NGSS.MS-PS2-2

To reduce friction, you could...

• place extra weight on the object that is moving

• use a lubricant such as grease

• remove wheels to reduce the downward pressure

Tags

NGSS.MS-PS2-2

Air resistance is-

• when you're falling down

• The force that acts in the opposite direction to objects moving in the air.

• when the wind is blowing at high speeds

• slowing down of wind

Gravity is-

• A change in position of an object over time.

• floating in the air

• The force that attracts objects towards the center of the earth.

• a push or a pull

Tags

NGSS.5-PS2-1