Forces

Define mass.

• The amount of space an objects takes up.

• The amount of matter in an object.

• The force of gravity acting on an object.

• Friction due to air which slows down moving objects.

The unit of mass is ...

• gram and kilogram

• centimetre and metre

• millilitre and litres

• Newtons

Gravity is ...

• a force that pushes everything upwards from the Earth

• a force that pulls everything down to the centre of the Earth.

• the amount of matter in the Earth.

• the force of friction in air that slows down moving objects.

The force of Earth's gravity is...

• 1 N/kg

• 10 N/cm

• 100 N/kg

• 10 N/kg

Tags

NGSS.MS-PS2-4

Weight is...

• the amount of matter in an object.

• the amount of space an object takes up.

• the force of gravity acting on the mass of an object.

• force of friction in air that slows down or stops moving objects.

Tags

NGSS.MS-PS2-4

Which of these has the most mass?

• A sheet of paper of 5 g

• A person of 60 kg

• A copy book of 70 g

• A coffee mug of 300 g

What is air resistance?

• Friction due to air

• Amount of matter in an object

• Also called drag.

• Force that slows down or stops objects moving through air.

• Force that pulls objects down towards the centre of the Earth

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

How do you calculate weight?

• mass x volume

• mass x force of gravity

• mass x length

• mass + force of gravity

Tags

NGSS.MS-PS2-4

What is the weight of an object that has a mass of 5 kg?

• 5 x 100 = 500 N

• 5 x 10 = 50 kg

• 0.005 x 10 = 0.05 N

• 5 x 10 = 50 N

What is the weight of an object of mass 60 kg?

• 60 x 100 = 6000 N

• 60 x 10 = 600 N

• 60 x 10 = 600 kg

• 60 x 1 = 60 N

Tags

NGSS.MS-PS2-4