Work, Energy, and Power (AQA A-Level Further Maths): Quizzes

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Work, Energy, and Power
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Under what condition is work done on an object?

When force causes movement in its direction

A constant force of 15 N moves an object 6 m. What is the work done?

90 J

What is one joule (J) defined as?

One newton metre

How do you calculate work done by a variable force FF over distance xx?

Use integration: 0xFdx\int_0^x F \, dx

A 12 N force at 60° to horizontal moves object 5 m. Work done?

30 J

When object moves horizontally, which forces do NO work?

Weight and normal reaction forces

What is the unit of power?

Watt, where 1 W = 1 J s1^{-1}

What is the formula for kinetic energy?

KE=12mv2KE = \frac{1}{2}mv^2

What is the formula for gravitational potential energy?

GPE=mghGPE = mgh

With energy losses, which equation is correct?

Initial energy = Final + Energy lost

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