Physics (5054)
Work, Energy & Power
MO
1 Electrical energy is provided to homes and industry from a coal-fired power station.
Some people are against the use of coal-fired power stations.
Give two environmental problems caused by coal-fired power stations.
1. ..............................................................................................................................................
..................................................................................................................................................
2. ..............................................................................................................................................
.................................................................................................................................................. [2]
[Total: 2]
2 The diagram shows an archer pulling the string of a bow.
State the type of energy stored in the bow when the archer bends it as shown in the diagram.
.................................................................................................................................................. [1]
[Total: 1]
, 2
3 The diagram shows a model of a wind turbine used to demonstrate the use of wind energy to
generate electricity. The wind is blowing towards the model, as shown.
The mass of air passing through the circular area swept out by the turbine blades each second is
7.5 kg. The kinetic energy of the air that passes through this circular area each second is 240 J.
Calculate the speed of the air.
speed = .............................................. [3]
[Total: 3]
Work, Energy & Power
MO
1 Electrical energy is provided to homes and industry from a coal-fired power station.
Some people are against the use of coal-fired power stations.
Give two environmental problems caused by coal-fired power stations.
1. ..............................................................................................................................................
..................................................................................................................................................
2. ..............................................................................................................................................
.................................................................................................................................................. [2]
[Total: 2]
2 The diagram shows an archer pulling the string of a bow.
State the type of energy stored in the bow when the archer bends it as shown in the diagram.
.................................................................................................................................................. [1]
[Total: 1]
, 2
3 The diagram shows a model of a wind turbine used to demonstrate the use of wind energy to
generate electricity. The wind is blowing towards the model, as shown.
The mass of air passing through the circular area swept out by the turbine blades each second is
7.5 kg. The kinetic energy of the air that passes through this circular area each second is 240 J.
Calculate the speed of the air.
speed = .............................................. [3]
[Total: 3]
