Formula Centre

Formula guides and key subject rules for every grade and subject, with worked examples and practice.

Grade 7 Technology essentials

Technology • Essential reference • Grade 7

Mechanical advantage = Load / Effort
LoadForce moved by the machine (N)
EffortForce applied (N)

When to use it

Use to compare force gained by a simple machine.

Worked example

A 100 N load moved with 25 N effort gives MA = 4.

Common mistakes

  • Reversing load and effort.

Practice question

Calculate MA for a 240 N load and 60 N effort.

Grade 8 Technology essentials

Technology • Essential reference • Grade 8

Mechanical advantage = Load / Effort
LoadForce moved by the machine (N)
EffortForce applied (N)

When to use it

Use to compare force gained by a simple machine.

Worked example

A 100 N load moved with 25 N effort gives MA = 4.

Common mistakes

  • Reversing load and effort.

Practice question

Calculate MA for a 240 N load and 60 N effort.

Grade 9 Technology essentials

Technology • Essential reference • Grade 9

Mechanical advantage = Load / Effort
LoadForce moved by the machine (N)
EffortForce applied (N)

When to use it

Use to compare force gained by a simple machine.

Worked example

A 100 N load moved with 25 N effort gives MA = 4.

Common mistakes

  • Reversing load and effort.

Practice question

Calculate MA for a 240 N load and 60 N effort.