Forces, Motion and Energy

What does friction do to the motion of an object?

• Friction slows down or stops an object.

• Friction keeps an object from moving.

• All of the above.

Objects that are smooth have LESS friction than objects that are rough.

• True

• False

What is the force that slows down or eventually stops an objects motion?

• Gravity

• Push

• Motion

• Friction

A student uses a spring scale to pull a 50-gram block horizontally across a wood desk. Then the student pulls the block the same distance across surfaces of carpet, sandpaper, and glass. Which question is this investigation most likely designed to answer? (5.6D)

• How do block of different sizes react to force?

• How do different surfaces affect the amount of force needed to move a block?

• How do blocks affect spring scales?

• How does the mass of a block change when it is pulled across a desk?

Tags

NGSS.MS-PS2-2

A student designs an experiment to test the force of a spring using a spring launcher and four spheres with the same diameter but with different masses. What other piece of equipment would be most useful for this experiment? (5.6D)

• A graduated cylinder to measure the volume of each sphere before the sphere is launched

• A beaker to collect the spheres after they are launched

• A stopwatch to measure how long it takes to load each sphere on the spring

• A meterstick to measure the height each sphere reaches after the sphere is launched

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which experiment listed below will best determine how friction affects the speed of a rolling object?

• Roll 3 objects of various sizes across the floor.

• Roll 3 objects of equal size from various heights across the floor.

• Roll 3 objects of equal size across 3 different types of surfaces.

• Roll 3 objects of equal size from equal heights across the floor.

Which word describes a push or pull on an object?

• Position

• Hypothesis

• Mass

• Force

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A polar bear slides down an ice covered hill. As he slides, he slows down. Eventually he comes to a stop. What force acts on an object to slow or stop its motion?

• Speed

• Friction

• Gravity

• Direction

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

To make an object move, it must be pushed or pulled with ____________.

• force

• direction

• gravity

• friction

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A student drops a ball from shoulder height. The ball bounces 5 times before coming to a stop. What force causes the ball to fall to the ground?

• Friction

• Magnetism

• Position

• Gravity

Tags

NGSS.MS-PS2-4