Y8 Forces

What is the unit of force?

• Newtons

• Kilograms

• Joules

• Watts

Which two are contact forces?

• Friction

• Air resistance

• Gravity

• Magnetic force

Which two are non-contact forces?

• Friction

• Air resistance

• Gravity

• Magnetic force

What is the name for a squashing force?

• Compression

• Tension

• Moment

• Reaction

What is the name for a stretching force?

• Compression

• Tension

• Moment

• Reaction

What is the name for the turning effect of a force?

• Compression

• Tension

• Moment

• Reaction

"If the force on an object doubles, the extension doubles." Whose law is this?

• Hooke's law

• Newton's law

• Ohm's law

• Boyle's law

What is the elastic limit of an object?

• The point at which it will no longer return to its original shape

• The point at which it breaks

• The point at which it starts stretching

• The largest amount it can be stretched by

What is the unit of a moment?

• Newton-metres

• Newtons

• Kilogram-metres

• Seconds

How do you calculate a moment?

• Force x distance from pivot

• Force ÷ distance from pivot

• Distance from pivot ÷ force

• Mass x gravitational field strength