Contact Forces Review

What force ultimately slows the roller coaster to a stop?

• Applied

• Normal

• Friction

• Magnetic

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-PS2-1

NGSS.MS-PS2-2

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

Two forces are applied to a box as shown in the model. Which statement BEST describes the effect these forces have on the box?

• The box does not move.

• The box moves to the right.

• The box moves to the left.

• The box moves straight up.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Name the missing force....

• weight force

• normal force

• frictional force

• tension force

Match the following forces to how they are working on the cake.

• the force the table is putting on the cake

• normal force

• attraction of the cake to the table

• gravity

• cake plate rubbing on table

• friction

Tags

6-8.AG.7.1

A bear pushes on a tree with 20 N of force. If the tree doesn't move, the tree is pushing back on the bear with _____of force.

• 40 N

• 20 N

• 10 N

• 70 N

Tags

NGSS.MS-PS2-1

A contact force is from

• objects physically touching

• far apart objects

• not touching object

• always a pull

Tags

NGSS.MS-PS2-1

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-PS2-1

NGSS.MS-PS2-2

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.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2