Year 7 physics revision - Forces

Friction that acts on an object moving through the air

• Air resistance

• effort

• contact force

• non-contact force

The force of attraction between any two objects

• gravity

• contact force

• non-contact force

• deceleration

A decrease in speed

• gravity

• contact force

• non-contact force

• deceleration

The point at which a falling object ceases to accelerate, but falls at a constant speed

• newton

• pulley

• friction

• terminal velocity

The units that force is measured in

• newton

• grams

• gravity

• kilograms

What sort of simple machine is this?

• inclined plane

• gears

• 1st class lever

• 2nd class lever

What sort of simple machine is this?

• inclined plane

• gears

• 1st class lever

• 2nd class lever

What sort of simple machine is this?

• inclined plane

• gears

• 1st class lever

• 2nd class lever

If the green gear is driven clockwise, what direction and speed will the purple wheel move?

• clockwise, faster than green gear

• clockwise, slower than green gear

• anti-clockwise, faster than green gear

• anti-clockwise, slower than green gear

If the green gear is driven clockwise, what direction and speed will the blue wheel move?

• clockwise, faster than green gear

• clockwise, slower than green gear

• anti-clockwise, faster than green gear

• anti-clockwise, slower than green gear