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9. Work and power

In Unit 2 and Unit 5 you learnt:
This is Serik Sapiyev, a 2012 Olympic
✔ what displacement and velocity are
champion and Val Barker Cup holder,
throwing, and moving away from, ✔ what force is, and the results of its action on
other objects Physics
powerful punches. What work is being
Key phrases:edu kz
done here? ✔ that force is measured in newtons, and distance
is measured in metres
✔ how to show the directions of forces acting on
objects in diagram form

In this unit you will learn:

✔ what mechanical work and power are

✔ the conditions required for doing work
textbooks nis
✔ how to calculate work and power

✔ Mechanical work is done when …

✔ Power is measured in … and work is measured
in …
✔ Power can be described as …

CCL In Maths classes you learnt how to use
scaling, how to find the coordinates of a point in
the Cartesian coordinate system and how to plot
straight lines on a plane. These
skills will help you in your
work with work vs. force
applied and work vs.
displacement graphs.

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