What two surfaces are in contact when:

You are pedalling a bike

Match the following forces to their definitions.

True or False:

Friction acts in the same direction as an object's motion.

True or False:

The greater the weight of the object, the more friction it experiences.

True or False:

Friction makes a machine work better.

Which is not a way to reduce friction?

Choose the word that best completes the sentence below:

Gravity is a ________ force.

Choose the word that best completes the sentence below:

Gravity _______ objects towards the Earth.

Choose the word that best completes the sentence below:

All objects naturally ________ each other.

Choose the word that best completes the sentence below:

Objects fall at different speeds due to their ______.

When are the forces balanced when someone is skydiving?

When are the forces unbalanced when someone is skydiving?

True or False:

A gravitational field is where gravity works on objects.

True or False:

The strength of a gravitational field increases as distance increases.

True or False:

Mass is the gravitational pull on an object.

True or False:

Gravitational attraction keeps things like moons and satellites in orbit around planets.