UNIT 5 - FORCES

Weight is a force measured in …

• kilograms

• pounds

• newtons

Which statement is TRUE?

• Gravity only acts through air.

• Gravity acts towards the centre of the Earth.

• Gravity doesn’t act on a flying aeroplane.

Which of these is not a force?

• Weight

• Upthrust

• Mass

When an object isn’t moving it means…

• The forces acting on it are balanced

• There are no forces acting on it

• Gravity is making it still

Where is your mass more?

• on the Moon

• on Earth

• It’s the same on the Moon as on Earth

What is the formula for calculating weight?

• mass + gravity = weight

• mass x gravity = weight

• mass x 1.6 = weight

Two forces are acting on him; gravity pulls him down and upthrust pushes him up. Which force is the biggest? How do you know?

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Is an opposite force to gravity:

• Magnetism

• Upthrust

• Pull

• Push

Gravity and magnetism are ...

• contact forces

• non-contact forces

Pull towards

• Attract

• Repel