Physics II Lesson 52: Friction Mini-Quiz

A 20 kg rock is resting on the ground on Earth (that has a gravity of 9.8m/s/s). The mass of the rock is...

• 9.8 N

• 20 kg

• 196 N

• 0 N

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A 20 kg rock is resting on the ground on Earth (that has a gravity of 9.8m/s/s). The weight of the rock is...

• 9.8 N

• 20 kg

• 196 N

• 0 N

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A large object is being pushed horizontally on the floor. A free-body diagram is partially labeled that describes this. The right arrow should be labeled "_______" and the bottom arrow should be labeled "_______".

• Fapplied, Fgravity

• Fgravity, Fapplied

• Fnormal, Ffrictin

• Fapplied, Fnormal

Tags

NGSS.MS-PS2-2

The first law of motion describes the inertia of objects, where an object in motion will remain in motion and an object at rest will remain at rest unless acted upon by an external net force. On Earth, what force typically acts on an object to slow it down when it is sliding horizontally.

• friction

• normal force

• applied force

• weight

Refer to the table that shows the friction coefficients of different materials. Based solely on their friction coefficients, which materials would be the best to make wheels and a road that would let a car accelerate the fastest? (Choose the best answer among the options given.)

• steel on steel

• glass on glass

• wood on wood

• teflon on teflon

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Refer to the table that shows the friction coefficients of different materials. Based solely on their friction coefficients, which materials would be the worst to make wheels and a road that would let a car accelerate the fastest? (Choose the best answer among the options given.)

• steel on steel

• glass on glass

• wood on wood

• teflon on teflon

Tags

NGSS.MS-ETS1-1

If a 20 kg toy train (with steel wheels) were driving on a steel track, what is the most friction it could decelerate with?

• 0.74 N

• 20 N

• 196 N

• 145 N

Tags

NGSS.MS-PS2-2

A 10 kg rock is on the moon (where gravity is -1.6 m/s/s). If you bring that rock back to Earth, what will its weight be on Earth?

• 20 kg

• 10 kg

• -16 N

• -98 N

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A 10 kg rock is on the moon (where gravity is -1.6 m/s/s). What is the weight of the rock on the moon?

• 20 kg

• 10 kg

• -98 N

• -15.68 N

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

When a block is being pushed horizontally on the ground but it is not moving. there is a ________ friction force between the ground and block.

• kinetic

• static

• quantum

• potential

• cheeseburger