5P - Machines and Power Knowledge Test

Candidate Name:
1) What causes a spring to deform?
2) What happens to an object when it is deformed elastically?
3) What energy transfers occur when an object is deformed elastically?
4) What happens to the elastic potential energy of a spring as it returns to its original shape?
5) What happens to an object when it is deformed plastically?
6) What energy transfers occur when an object is plastically deformed and where is the energy?
7) What is happening to a spring during the linear region of a force-extension graph? At what point does the spring stop obeying Hooke's law?
8) What is the role of a machine in terms of forces?
9) What is the advantage and disadvantage of a simple machine?
10) Give 3 examples of simple machines.
11) What is work done? What is work done also known as? What unit do we use for work done?
12) What is the relationship between energy transferred in and work done?
13) What is a moment?
14) What two factors is the size of a moment proportional to?
15) What unit do we use for moments?
16) What is gas pressure caused by?
17) What is atmospheric pressure caused by?
18) What effect does increase of height have on atmospheric pressure? Explain this.
19) What is the equation for calculating pressure?
20) What is pressure in fluids caused by?
21) What is the magnitude of the pressure in liquids equal to?
22) What happens to the pressure in liquids when depth is increased?
23) What is the relationship between the upthrust force and the weight of the water?
24) To what point will an object sink to?
25) What causes an object to sink?
26) What causes an object to float?
27) What is the density of water equal to?
28) What effect do objects that are less dense than water have on the water?
29) What effect do objects that are more dense than water have on water?
30) What method is used to heat most homes? How do urban homes get this resource? How do rural homes get this resource?
31) What is a non-renewable energy source? Give some examples.
32) What is the main difference between homes powered by gas and homes powered by oil?
33) What are most of the appliances in the home powered by?
34) Where is electricity generated?
35) What is a renewable energy source? Give some examples.
36) How do most thermal power stations work?
37) How do most non-thermal power stations work?
38) What energy transfers occur in solar power stations?
39) What sort of appliances generally use the most energy?
40) What does the amount of energy transferred depend on?
41) What is the equation for calculating energy?
42) How many Joules are there in a kilojoule?
43) What is a kilowatt hour? What units are used?
44) How is the amount of energy used by a customer measured?
45) What is the equation for calculating the cost of electricity?
46) What is the rough cost of an electrical unit?
47) How do the Big Ideas link to this topic?

a) Forces:

b) Particles:

c) Energy:

d) Cells: