Forces and Mechanisms

Place a tick in the correct column to identify the types of forces listed.

• Gravitational force

• Frictional force

• Magnetic force

• Elastic force

What is the name of the scientist who identified the force of gravity in 1665 by, as legend has it, watching an apple fall downwards from a tree?

• Albert Einstein

• Isaac Newton

• Galileo Galilei

• Nikola Tesla

Which of these statements correctly describes the relationship between mass and weight? Tick one.

• Mass and weight are the same.

• Mass is the amount of matter that an object contains and weight is this amount multiplied by two.

• Mass is the amount of matter that an object contains, and weight is a measure of the gravitational force acting on an object.

• Weight is the amount of matter that an object contains, and mass is a measure of gravitational force acting on an object.

If an object has a mass of 200g, what is it's weight in N?

• 20N

• 2N

• 200N

• 2000N

Friction is in all places where two surfaces meet. True or False?

• True

• False

Friction acts in the same direction as/opposite direction to the movement.

• opposite direction

• same direction

• perpendicular direction

• random direction

What does friction do to a moving object?

• slows down

• speeds up

• stops

• changes direction

Adding tread patterns to the soles of shoes increases/decreases frictional force.

• increases

• decreases

• has no effect

What force is the black arrows representing?

• water resistance

• air resistance

• friction

• gravity

• push

Tick true or false after these statements about air resistance. Air resistance is caused by air particles hitting an object and slowing it down.

• True

• False