4.10 ANSWERS

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4.10 understand that work done is equal to energy transferred ANSWERS

1.

a) The work done (measured in joules ) is equal to the force (in newtons) multiplied by the force moved(in metres).

b) 1 joule is the work done when a force of  one newton through a distance of one metre ( in direction of the force).

d) work done = energy transferred.

2.

Wd=fxd               wd=5x2                wd=10J

4.

Wd=fxd                wd=500x40         wd=20,000J

Q1.

Wd=fxd                50,000/4,000=12.5m