force

Multiple Choice

Forces can be:

• Pushes only

• Pulls only

• Pushes and pulls

Multiple Choice

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

• friction acting on the skateboard

• the mass of the skateboard

• the mass of the boy

Multiple Choice

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

• mass

• friction

• gravity

• speed

Multiple Choice

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

• book will stay at rest

• book will begin to move

• mass of the book will increase

• gravity on the book will increase

Multiple Choice

. A girl placed a leaf in a stream. After 5 minutes, the leaf moved 100 yards away from the girl. Which best explains why leaf changed it position?

• the pulling force of the wind

• the pushing force of the stream

• the pulling force of the leaf against the water

• the pushing force of the leaf against the water.

Multiple Choice

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

• Mark kicked with less force

• Mark kicked with more force

• Mark kick had less friction

• the pushing force of the leaf against the water.

Multiple Select

1. A push or a pull on an object is:

• stationary

• its weight

• a pressure

• a force

Multiple Choice

Forces can change the

• slow down or speed up objects only

• speed, direction or shape of an object

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

Multiple Choice

To reduce friction, one could:

• place extra weight on the object that is moving

• remove wheels to reduce the downward pressure in trolleys

• use a lubricant such as grease