1.7. Energy, work and power
A subsection of Physics, 0625, through 1. Motion, forces and energy
Listing 10 of 536 questions
Electricity is distributed from wind turbines to homes and industry. Statements A–F describe the main stages in the transfer of energy from the Sun to electrical energy in a wind turbine generator. The statements A–F are not in the correct order. A Air moves from regions of high pressure to regions of low pressure. B The turbine blades turn a generator. C Energy from the Sun heats the atmosphere unevenly. D Uneven heating of the atmosphere produces regions of different atmospheric pressure. E The generator produces electrical energy. F Moving air turns the turbine blades. Complete the flow chart to describe how a wind turbine uses energy from the Sun to generate electrical energy. Insert the missing letters in the empty boxes. D A State two disadvantages, apart from cost, of using wind turbines to produce electrical energy for homes and industry.
0625_s23_qp_31
THEORY
2023
Paper 3, Variant 1
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A student has a battery-powered torch. shows the torch. base of torch shows the energy transfers when the torch is switched on. The diagram is incomplete. energy store electrical working 100 J energy thermal energy store 70 J J Show the energy transfers in the torch by completing the labels on . The weight of the torch is 8.5 N. The student lifts the torch a vertical distance of 0.80 m to place it on a shelf. Calculate the work done on the torch by the student. work done = J The student places the torch on its base on a shelf. The area of the base of the torch is 44 cm2. The weight of the torch is 8.5 N. Calculate the pressure on the shelf due to the torch. pressure on shelf = N / cm2
0625_s23_qp_32
THEORY
2023
Paper 3, Variant 2
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A simple pendulum starts with its bob at position X, shown in . The bob is pulled aside to Y and then released. It swings from Y to Z and back to Y. support pendulum bob ground Y X Z thin cord Write suitable words in the gaps in the following sentences. Ignore air resistance. In order to move the bob from X to Y, has to be done on it and its energy increases because it is raised further from the ground. As it moves towards X, some of this energy is converted into energy. Throughout the swing from Y to Z and back to Y, the total energy is . Energy is measured in units called .
0625_w10_qp_22
THEORY
2010
Paper 2, Variant 2
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A simple pendulum starts with its bob at position X, shown in . The bob is pulled aside to Y and then released. It swings from Y to Z and back to Y. support pendulum bob ground Y X Z thin cord Write suitable words in the gaps in the following sentences. Ignore air resistance. In order to move the bob from X to Y, has to be done on it and its energy increases because it is raised further from the ground. As it moves towards X, some of this energy is converted into energy. Throughout the swing from Y to Z and back to Y, the total energy is . Energy is measured in units called .
0625_w10_qp_23
THEORY
2010
Paper 2, Variant 3
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Use words from the list below to complete the sentences about work and energy. initial acceleration distance moved force exerted potential energy time taken An object is dragged across a rough surface. In order to find the work done on the object, it is necessary to know the and the . To calculate the power, it is also necessary to know the . A machine working in a factory actually uses more energy than is needed to do the task it is involved in. Suggest why this is so.
0625_w14_qp_21
THEORY
2014
Paper 2, Variant 1
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Use words from the list below to complete the sentences about work and energy. initial acceleration distance moved force exerted potential energy time taken An object is dragged across a rough surface. In order to find the work done on the object, it is necessary to know the and the . To calculate the power, it is also necessary to know the . A machine working in a factory actually uses more energy than is needed to do the task it is involved in. Suggest why this is so.
0625_w14_qp_23
THEORY
2014
Paper 2, Variant 3
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Questions Discovered
536