Work, Energy, Power (Leaving Cert Applied Maths): Quizzes

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Work, Power & Drag Forces
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What is work defined as in physics?

Energy transferred when force causes motion

What is the formula for calculating work?

Work = Force × Distance

What is the SI unit of work?

Joule (J)

What does power measure?

How quickly work is being done

One Watt equals one Joule per what?

Second

For an object at constant velocity, Power Output equals what?

Force × Velocity

At constant velocity, driving force equals what?

Total resistance forces

How do drag forces change as speed increases?

They increase

For air resistance, the drag force is often modelled as what?

D=kv2D = kv^2

What happens when a vehicle reaches maximum speed?

It can no longer accelerate

What is the formula for kinetic energy?

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

Which component of tension TT does work on a toboggan?

Horizontal: Tcos⁡θT \cos \theta

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