Forces

What are forces?

• Drag and drop

• Point and click

• Seek and destroy

• Push and pull

When forces are balanced the body

• Stays at rest or moves with same speed

• Speeds up

• Slows down

• Moves with same speed

Forces are measured in

• kilograms (kg)

• metres (m)

• Newtons (N)

• Volts (V)

What will change if we land on the Moon

• mass

• mass and weight

• weight

• nothing

Which force slows down a moving object?

• friction

• weight

• upthrust

• reaction force

Which force helps ships to float?

• friction

• weight

• upthrust

• tension force

Weight on Earth is directed

• up

• opposite to direction of motion

• to the centre of Earth

• parallel to the ground

A body floats if upthrust is ...... its weight.

• equal to

• less than

• more than

What will INCREASE friction?

• Making surface smooth

• Lubrication

• Making surface rough

• Using ball bearings

Density is

• mass + volume

• mass / volume

• volume / mass

• mass x volume