Forces and Mechanisms Quiz!

Which of these forces are contact forces?

• Air Resistance

• Gravity

• Magnetism

• Water Resistance

• Friction

Answer explanation

Well done!

Water resistance, air resistance and friction are all contact forces.

Gravity and magnetism are non-contact forces.

Gravity pushes objects away from the ground

• True

• False

Answer explanation

Great job!

Gravity pulls all objects towards the centre of the Earth.

All objects have a gravitational force

• True

• False

Answer explanation

Well done!

Anything with matter has a gravitational force!

Gravitational force keeps the planets in our Solar System in orbit around the sun.

• True

• False

Answer explanation

Well done!

If this didn't happen, our planets would not remain in our solar system!

Objects with less mass have a greater gravitational force

• True

• False

Answer explanation

Well done!

Think back to that experiment? Did it matter the mass of the objects?

Nope!

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

• Sir Isaac Newton

• Galileo

• Aristotle

Answer explanation

Good job!

It was indeed Isaac Newton!

Bop goes the apple!

Which statement correctly describes mass and weight?

• Mass and weight are the same

• Mass is the amount of matter.

  Weight is this multiplied by two.

• Weight is the amount of matter.

  Mass is the measure of gravitational force

• Mass is the amount of matter.

  Weight is the measure of gravitational force.

Answer explanation

Woop Woop!

Remember next time you're baking; you're measuring its mass...not its weight!

Look at the diagram of a force meter.

What is the object's mass in grams?

What is the object's weight in newtons?

• 200g

  200N

• 2000g

  2000N

• 2000g

  20N

• 2000g

  200N

Answer explanation

Ooooh.... that was a nasty one!

Well done for getting it right though...or was it just a guess?

Label the forces on this diagram.

Answer explanation

Did you put air resistance at the top?

Gravity at the bottom?

Give yourself a hi-5!

Label the diagram with the correct forces.

Answer explanation

Did you put water resistance going against the submarine?

DId you put push on the way the submarine is going?

Hey.... go you! Give yourself a pat on the back