Gravity and Friction

Friction is a force that acts in a(n) ___________ direction relative to a moving object.

• similar
• opposite
• parallel
• perpendicular

Which two factors effect the force of gravity between 2 objects are...

• Mass and Distance

• Mass and Matter

• Distance and Weight

• Weight and Mass

The force of gravity acting on an object is the object's ______.

• Mass
• Matter
• Weight 
• Terminal velocity 

Tags

NGSS.MS-PS2-4

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 a constant speed.

Tags

NGSS.MS-PS2-2

You can reduce friction by

• reducing surface area

• making the surfaces rougher

• increasing mass

• increasing surface area

Weight is the measure of gravitational force on an object.

• True
• False

Tags

NGSS.MS-PS2-4

 A push or a pull on an object

• friction
• force
• gravity
• kilogram

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Force between two surfaces that are sliding is known as

• magnetism

• friction

• electric force

• I don't know

Two toy race cars are going to be raced down the same ramp. Which information is most helpful in predicting which car will win the race?

• length of the ramp

• volume of the car

• slope of the ramp

• mass of the car

A man is pushing a ball up a hill. If the man stops pushing the ball and steps out of the way, what will most likely happen to the ball?

• It will stop on the hill

• It will roll down the hill

• It will fly

• It will roll to the side toward the man