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Q 1/14
Score 0
Which of the following is an energy store?
60
electrical current
heating
waves
thermal
Q 2/14
Score 0
Which of the following involves useful energy transfers by heating and by a force?
60
cooking a pizza in an electric oven
going up in a lift
drying clothes in a tumble dryer
drying clothes in a tumble dryer
14 questions
Q.
Which of the following is an energy store?
1
60 sec
6.1.1.1
Q.
Which of the following involves useful energy transfers by heating and by a force?
2
60 sec
6.2.4.2
Q.
Calculate how much work is done when a force of 1600 N pulls a car through a distance of 40 m in the direction of the force.
3
300 sec
6.5.2
Q.
Read the descriptions below about energy transfers when a heavy object is dropped. Only one description is correct. Select the correct description.
4
120 sec
6.1.2.1
Q.
Which of the following statements about a closed system is correct?
5
60 sec
6.1.1.3
Q.
A person climbs up some stairs. Which sentence about the change in energy stores is correct?
6
60 sec
6.1.1.3
Q.
Put these sentences in order to describe what happens when a ball falls.
7
120 sec
6.1.1.3
Q.
A motor transfers 12 kJ of energy in 30 s. Calculate its power.
8
300 sec
6.1.1.4
Q.
A suitcase of mass 20 kg moves along a conveyor belt at 0.5 m/s. Calculate its kinetic energy
9
300 sec
6.1.1.2
Q.
A motor has an input power of 120 W and is 40 % efficient. Calculate the power wasted by the motor.
10
300 sec
6.1.1.4
Q.
A spring with a spring constant of 50 N/m is stretched by an extension of 2 cm. Calculate the energy in its elastic energy potential store.
11
300 sec
6.1.1.2
Q.
The table shows the power ratings of some different appliances. Place the appliances in order of power rating, starting with the lowest power rating.
12
300 sec
6.1.1.4
Q.
A machine is 40 % efficient. The total energy supplied to the machine is 4 kJ. Calculate how much useful energy can be transferred.
13
300 sec
6.1.2.1
Q.
The springs in a car’s suspension have a spring constant of 50 000 N/m. The elastic potential energy store is 0.025 J. Calculate the extension of the springs.
