Chapter 5: Forces and Matter - IGCSE Physics

What word means the weights hung on the end of a spring?

Load

2. Write down the equation that links the length of a spring, the original length and the extension.

length = the original length + extension OR extension = length - original length

Hooke's Law says that the extension of a spring is proportional to the force applied, until it reaches the ___________ ____ _____________ .

Limit of proportionality

Write down Hooke's Law as an equation, in symbols.

F = k x

In the symbols for the Hooke's law equation, what does 'k' mean?

Spring constant

In the symbols for the Hooke's law equation, what does 'x' mean?

extension

What are the units of 'k'?

N/cm

If k is high, what does that mean about the spring?

The spring is stiff / it is difficult to stretch it

Write down the equation for pressure.

Pressure = force ÷ area

. Will a higher or a lower force create a high pressure?

higher

Will a larger or a smaller area create a high pressure?

smaller

What are the two units for pressure, which actually mean the same thing?

N/m2 and Pa (pascal)

Shoes with narrow heels can damage the floor. Is this because they create a high or a low pressure?

High