IGCSE General Physics

Question 1

How do you find speed from a distance time graph?

Answer 1

Speed can be found from the GRADIENT of a distance time graph.

Question 2

How do you find acceleration from a velocity time graph?

Answer 2

Acceleration can be found from the GRADIENT of the velocity time graph.

Question 3

How do you find distance travelled from a velocity time graph?

Answer 3

Distance travelled can be found from the AREA underneath a velocity time graph.

Question 4

State Hooke’s Law in words

Answer 4

Force is directly proportional to extension (up to the limit of proportionality)

Question 5

List 10 forms of energy

Answer 5

kinetic, gravitational potential, chemical, strain, nuclear, internal, electrical, thermal, light, sound.

Question 6

What is the law of conservation of energy?

Answer 6

Energy cannot be created or destroyed.
It is transformed from one form to another
or transferred from one place to another.

Question 7

How is energy released in the sun?

Answer 7

Nuclear FUSION

two light nuclei join to make a larger nucleus

Question 8

How is energy released in a power station?

Answer 8

Nuclear FISSION 
(A nucleus is split into two smaller nuclei)

Question 9

Name 2 ways of generating electricity where the energy does not originate from the sun.

Answer 9

Geothermal, and Nuclear.

Question 10

What type of energy is stored in a fuel

or food or batteries

Answer 10

Chemical

Question 11

What type of energy does water behind a dam in a hydroelectric power station have

Answer 11

Gravitational Potential Energy

Question 12

What is the difference between a solar cell and a solar panel?

Answer 12

Solar cells convert light into electrical energy.

Solar panels use heat from the sun to heat water.

Question 13

Define Efficiency

Answer 13

Efficiency is a measure of how much energy supplied to a device is usefully used.

Question 14

Define Power

Answer 14

Power is the rate of transfer of energy