friction class 8

Complete the sentence.

It is not the difference in gravity that causes objects to fall at different speeds, it’s the difference in the amount of__________________.

• Gravity

• Mass

• Air resistance

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

• similar

• opposite

• parallel

• perpendicular

The amount of matter in an object is its _____________.

• Weight

• Mass

• force

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

• similar

• opposite

• parallel

• west

What keeps the planets in orbit around the sun?

• gravity

• friction

• density

• distance

When a falling object stops accelerating and falls at a constant speed, it is

• fluency

• constant velocity

• acceleration

• terminal velocity

Imagine you decide to jump out of an airplane 🛩

Which force is going to pull you down towards earth

• Fluid Friction

• static Friction

• Gravity

• the wind from the airplane

________ acts to slow the rate at which objects fall.

• Thrust

• barometer

• Air Resistance

• Gravity

If you jump out of an airplane, which two forces are acting on you?

• Gravity and friction

• Force and gravity

• Gravity and Air Resistance

The upward force which is exerted against a falling object is

• gravity

• terminal velocity

• air resistance

• intertia