Gravitational, Normal, Applied and Friction Forces

What force ultimately slows the roller coaster to a stop?

• Applied

• Normal

• Friction

• Gravitational

Tags

NGSS.MS-PS3-5

What force holds the planets in motion around the sun?

• Magnetic
• Electrical
• Gravitational
• Air Resistance

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

NGSS.MS-PS2-5

Rina’s mother asked her to help move some items from the hall closet to the garage. One item she wanted to move was a large box of old school books. Rina tried to lift the box, but could not pick it up. What force was Rina NOT able to overcome?

• frictional force

• gravitational force

• applied force

• normal force

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Leanna decided to rearrange her bedroom by moving her dresser to the opposite wall. She tried pushing it, but found that the dresser would not move. What force was Leanne NOT able to overcome?

• normal force

• gravitational force

• tension force

• frictional force

Friction is a force that acts in an ___________ direction of movement.

• similar
• opposite
• parallel
• west

How can friction be reduced?

• reduce the force acting between the 2 surfaces
• reduce the roughness of the 2 surfaces coming in contact
• use wax, grease or oil
• all of the above are ways of reducing friction

A type of friction that occurs when air pushes against a moving object causing it to decelerate.

• surface area
• air resistance
• velocity
• gravity 

How would the absence of friction affect a marble traveling on a long, straight path?

• The marble’s speed would decrease.
• The marble’s speed would increase.
• The marble would stop immediately. 
• The marble would remain at constant speed.

The SI Unit of force is

• Pascal

• Meter/second

• Newton

• kg

Generated between two bodies in contact with each other by resistance to rubbing between them.

• Push or pull

• Tension

• Elasticity

• Friction