STEM8.Newtons 3rd Law

What happens when a car hits a wall according to Newton's Third Law?

• The car bounces back with more speed.

• The car stops without any force from the wall.

• The wall moves backward.

• The car and wall exert equal and opposite forces on each other.

Why do forces always exist in pairs?

• Because forces are not real.

• Because forces are only in one direction.

• Because forces are interactions between objects.

• Because forces are imaginary.

When hammering a nail, why does the nail move into the wood?

• Because the nail is stronger than the hammer.

• Because the nail is heavier than the hammer.

• Because the hammer applies a net force on the nail.

• Because the wood pulls the nail in.

What should we consider when looking at the motion of a hammer?

• Only the forces acting on the hammer.

• No forces at all.

• Only the forces acting on the nail.

• All forces in the universe.

Why don't we notice the earth moving towards a falling rock?

• Because the earth doesn't have gravity.

• Because the earth is too big.

• Because the rock is too small.

• Because the rock doesn't fall.