Forces

1. Chen writes some sentences about forces. Only one sentence is correct. Choose the correct sentence.

• Force is also called mass

• Force have direction

The unit of measurement for mass is

• kilogram

• NEWTON

The unit of measurement for friction is

• Newtons

• kg

The unit of measurement for weight is

• kg

• Newtons

If friction acts on an object the speed of the object ...

• decreases

• increases

The frictional force that slows down an object travelling through the air is called

• Resistance

• Force

Force is

• friction

• Push/Pull

Youssef thinks that the door does not open because there is too much friction. What does he do to reduce the friction? Choose the correct answer.

• make the door bigger

• add oil to the floor