Unit 5 (p. 78 and 79)

What is the normal force?

• A force that pulls objects toward the center of the Earth

• A force that acts horizontal to the surface of contact

• A force that causes an object to move

• A force that pushes objects away from each other

What is applied force?

• The force done by gravity on an object

• A force that keeps objects in place

• A force caused by friction

• A force that someone or something applies to an object

What does friction do?

• It makes objects move faster

• It stops objects from moving

• It pushes objects away

• It causes objects to float

Which of these is an example of buoyancy?

• A car pushing a box

• A bottle floating on water

• A magnet attracting metal

• A person applying force to open a doorbuobuoyancubuio

What is gravitational force?

• A force that pushes objects away from each other

• A force that causes objects to float

• A force that pulls objects toward the center of the Earthgra

• A force that attracts opposite charges

What is magnetic force?

• A force caused by magnets on magnetic materials

• A force caused by gravity

• A force that pulls objects toward the Earth

• A force that attracts or repels objects with an electric charge

Which of the following is an example of electrostatic force?

• A balloon sticking to a wall after rubbing it on your hair

• A magnet attracting a nail

• A book falling from a shelf

• A person pushing a carglo

What does gravitational force cause?

• Objects to float in space

• Objects to fall towards the Earth

• Objects to move faster

• Objects to repel each other

Which of these is an example of a non-contact force?

• Friction

• Applied force

• Gravitational force

• Normal force

How does a magnet interact with other magnets?

• By applying force

• By causing friction

• By attracting or repelling

• By buoyancy