FRICTION

______________________ is the force that resists the motion of two surfaces that are touching.

• gravity

• friction

• force

• non-contact

What two forces hold an object in place.

• gravity

• weight

• contact force

• static friction

Tags

NGSS.MS-PS2-4

A person skiing down a hill is an example of ______________ friction.

• static

• sliding

• rolling

• fluid

How can you reduce the amount of friction between 2 objects?

• Increase the gravitational force.

• Increase the amount of force put on the objects.

• Reduce the amount of contact between the two surfaces.

• Add more weight to the objects.

A person using a parachute is an example of ______________ friction.

• static

• sliding

• rolling

• fluid

___________________ is an object's ability to resist a change in motion.

• gravity

• force

• inertia

• weight

An object that is not moving is an example of _____________ friction.

• static

• rolling

• sliding

• fluid

Why is it easier to roll an object than it is to slide it?

• less surface area

• more surface area

• more aerodynamic

• it is heavier

Tags

NGSS.MS-PS3-1

Which type of force is always acting in the opposite direction of an object's motion?

• gravity

• contact force

• noncontact force

• air resistance

When friction is increased an object's speed _______________.

• increases

• decreases

• stays the same