Forces 3

What is a force?

• A type of energy

• A push or a pull

• A kind of machine

• A unit of measurement

What happens when you jump on a trampoline?

• The trampoline breaks

• Your weight stretches the springs downwards

• You float in the air

• You fall straight down

What is the unit of force?

• Pound

• Newton

• Meter

• Kilogram

Which of the following is an example of elastic force?

• Friction between two surfaces

• A spring returning to its original shape

• Magnetic attraction

• Gravity pulling an object down

What does frictional force do?

• Decreases speed

• Increases speed

• Makes objects float

• Stops the motion of surfaces sliding against each other

What is gravitational force?

• A force that pushes objects away

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

• A force that makes objects spin

• A force that creates heat

Which of the following is NOT a type of force?

• Frictional force

• Elastic force

• Thermal force

• Magnetic force

What effect does a greater frictional force have on a moving object?

• It makes it move a shorter distance before stopping

• It makes it move faster

• It has no effect

• It makes it float

What is a lever?

• A force that pulls objects

• A simple machine that helps lift loads

• A type of gravitational force

• A type of friction

What is the purpose of a pulley?

• To measure force

• To change the direction of effort needed to lift a load

• To increase the weight of an object

• To create friction