Test
AS Level Physics U6 Introductory Quiz
Preguntas del test (6)
1 What is the approximate kinetic energy of an Olympic athlete when running at maximum speed during a 100 m race?
- AA 400 J
- BB 4000 J
- CC 40 000 J
- DD 400 000 J
2Two identical, perfectly elastic spheres have the same mass m. They travel towards each other with the same speed v along a horizontal frictionless surface.
Which statement about the sum of the kinetic energies of the spheres is correct?
- AA The sum of their kinetic energies before impact is zero.
- BB The sum of their kinetic energies before impact is 1/2 mv^2.
- CC The sum of their kinetic energies after impact is zero.
- DD The sum of their kinetic energies after impact is mv^2.
3A piston in a gas supply pump has an area of 500 cm2 and it moves a distance of 30 cm during
one stroke.
The pump moves the gas against a fixed pressure of 4000 Pa.
How much work is done by the piston during one stroke?- AA 60 J
- BB 6.0 × 10^3 J
- CC 6.0 × 10^5 J
- DD 6.0 × 10^7 J
4A railway engine accelerates a train of total mass 1200 tonnes (1 tonne = 1000 kg) from rest to a speed of 75 m s^–1.
How much useful work must be done on the train to reach this speed?- AA 1.7 × 10^6 J
- BB 3.4 × 10^6 J
- CC 1.7 × 10^9 J
- DD 3.4 × 10^9 J
5The diagram shows a hydroelectric power station.
The reservoir is linked to the turbines by a pipe of uniform cross-sectional area. Water flows from the reservoir, through the pipe and through the turbines at a constant rate.
Which statement about the change of energy of the water as it moves from X to Y is correct?- AA It gains both gravitational potential energy and kinetic energy.
- BB It loses gravitational potential energy and gains elastic potential energy.
- CC It loses gravitational potential energy and gains kinetic energy.
- DD It loses both elastic potential energy and gravitational potential energy.
6A concrete cube of side 0.60 m and uniform density 2.0 × 10^3 kg.m^–3 is lifted 5.0 m vertically by a crane.
What is the change in potential energy of the cube?- AA 2.2 kJ
- BB 21 kJ
- CC 59 kJ
- DD 450 kJ
Información
- Descripción
- Quiz for AS Level Physics lesson 1 on Unit 6 Energy, work & power.
- Autor
- Jeffrey Piggott
- Idioma
- English
- Visitas
- 180
- Historial
- Creado el 28 oct 2018 · actualizado el 28 oct 2018
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