Friction & Gravity

The attractive force between objects.

• friction

• gravity

• electromagnetism

• nuclear force

Tags

NGSS.MS-PS2-4

The force that two surfaces exert on each other when they rub against each other.

• gravity

• friction

• electromagnetism

• nuclear force

The force of friction is stronger...

• ...as the mass of an object increases.

• ...as the distance between objects decreases.

• ...as surfaces push harder against each other.

• ...for smoother surfaces.

The force of gravity is stronger...

• ...as the mass of an object decreases.

• ...as the distance between objects decreases.

• ...as surfaces push harder against each other.

• ...for rougher surfaces.

Tags

NGSS.MS-PS2-4

When a skydiver jumps out of a plane, they accelerate ___ downward due to gravity.

• 9.8 m/s²

• 12.3 m/s²

• 4.6 m/s²

• 6.5 m/s²

Tags

NGSS.MS-PS2-4

When a skydiver releases their parachute, they slow down due to which type of friction?

• rolling friction

• sliding friction

• fluid friction

• static friction

Which of the following is an example of static friction?

• a book resting on a table

• a ball rolling along the ground

• a desk being pushed along the floor

• a paper plane gliding through the air

When an astronaut travels to Mars, they would have the same ___ but different ___ due to gravity.

• mass ; weight

• weight ; mass

• height ; mass

• weight ; height

A 4-kg bowling ball would have a weight of ___.

• 39.2 N

• 13.8 N

• 5.8 N

• 2.5 N

In which scenario would there be the LEAST amount of sliding friction?

• pushing a box on a grassy surface

• pushing a box on an icy surface

• pushing a box on a rocky surface

• pushing a box on a sandy surface