Contact Forces Review

When you drop a hammer and a feather, why does the feather fall slower?

• air resistance causes the feather to slow down

• gravity pulls harder on the hammer than the feather

• gravity pulls harder on the feather than the hammer

• air resistance causes the hammer to fall slower

Tags

NGSS.MS-PS2-2

A contact force is from

• objects physically touching

• far apart objects

• not touching object

• always a pull

Tags

NGSS.MS-PS2-5

How could you describe a force?

• Moving up or down

• A push or pull

• Going in or out

• Being hot or cold

Tags

NGSS.MS-PS2-2

What force ultimately slows the roller coaster to a stop?

• Applied

• Normal

• Friction

• Magnetic

Tags

NGSS.MS-PS2-2

This type of force resist motion between two surfaces that are pressed together

• Contact

• Gravity

• Friction

Based on the model, how will the rope move?

• The rope will not move because the forces are even

• The rope will move to the right because there is more force

• The rope will move to the left because there is more force

Tags

NGSS.MS-PS2-2

Two identical sheets of paper are used in an experiment; one is crumpled into a ball and the other is flat. What will MOST likely happen when they are dropped at the same time from the same height?

• flat sheet will fall on its edge

• both will fall at the same rate

• crumpled sheet will fall faster

• crumpled sheet will move horizontally

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A student is attempting to move a piece of furniture from Point A to Point B and argues that another student in the room should help push the furniture. The other student argues that only one person is needed, and they should use coasters under the edges of the furniture. Which statement supports the argument that only one student is needed to push the couch shown in Figure 1? 

• Doubling the amount of force used to push would distribute the mass more evenly and therefore make the couch easier to move. 

• Doubling the amount of force used to push would decrease the force of friction and therefore make the couch easier to move.

• The coasters under the edges of the furniture would increase the force of friction and therefore increase the amount of force needed to move the couch.

• The coasters under the edges of the furniture would decrease the force of friction and therefore decrease the amount of force needed to move the couch. 

When a hammer strikes a nail, the nail

• exerts balanced forces that helps it from moving.

• exerts a force equal to the weight of the hammer.

• exerts an unbalanced force that changes its velocity.

• exerts an equal and opposite force back on the hammer.

Tags

NGSS.MS-PS2-1

A Student is rolling different types of balls down a ramp that have different masses. Based on the masses, predict which ball will have the most kinetic energy.

• 60 g

• 6 g

• 16 g

• 0.6 g

Tags

NGSS.MS-PS3-1