Measuring power and energy - Chapter18 - Foundation Physics

1.  A more powerful athlete transfers more in a certain time.  Power is a measure of energy is transferred.

2.  Who is working harder?

3.  Who has transferred more energy to the weights in one minute?

4.  Who takes longer to move the books?

5.  Who is transferring more energy?

6.  Who is transferring more energy faster?

7.  Who is producing more power?

9.  What is the power of the person running up stairs? W

10.  How much energy has the lamp transferred? J

11.  How much energy has the kettle transferred? kJ

What you need to remember:

Energy is measured in (J). Power is measured in (W). 

One watt is one of energy transferred every

(watts) = energy transferred (joules)

                                                     time taken (seconds)  

   =        power    x    time

                                    (joules)                                         (watts)     (seconds)

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