Topic 7 & 8 Forces, work & power Flashcards
1 What are the units for energy?
joules
2 How is energy transferred to a light bulb?
by electricity
3 How is energy transferred away from a light bulb?
by light, by heating
4 Describe one other way in which energy can be transferred.
by sound, by forces
5 What is a force?
a push or a pull
6 What are the units for measuring forces?
newtons
7 What is your weight?
the force of gravity pulling on you
8 What does work done mean in physics?
energy transferred by a force
9 What does power measure?
how fast energy is transferred/work is done
10 What are the units for power?
watts
11 What does work done mean?
energy transferred by a force
12 What are the units for work done?
joules
13 How do you calculate work done?
Multiply force by distance moved in the direction of the force.
14 What does power mean?
how fast energy is transferred
15 What are the units for power?
watts