AQA GCSE Physics Unit 2.3

Beschreibung

Twenty questions on the third section of Unit 2 of AQA GCSE Physics: Work and energy.
Matthew T
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Zusammenfassung der Ressource

Frage 1

Frage
True or false? Work is done when an object is moved by a force.
Antworten
  • True
  • False

Frage 2

Frage
True or false? Work uses a different SI unit to energy.
Antworten
  • True
  • False

Frage 3

Frage
Into which form of energy does most energy become when work is done to overcome friction?
Antworten
  • Thermal
  • Electric
  • Sound

Frage 4

Frage
True or false? Gravitational potential energy is energy stored in an object because of its position in the Earth's gravitational field.
Antworten
  • True
  • False

Frage 5

Frage
What is the gravitational potential energy of an object of 0.5kg mass if it is lifted by 3m?
Antworten
  • 1.5J
  • 3J
  • 15J
  • 10.5J

Frage 6

Frage
What is the power developed of an object which, when lifted, gains 60J in 10s?
Antworten
  • 600W
  • 6W
  • 60W

Frage 7

Frage
True or false? Kinetic energy is the energy of an object when it is stationary.
Antworten
  • True
  • False

Frage 8

Frage
Which of these is the correct formula for kinetic energy?
Antworten
  • KE = 1/2 * m * v
  • KE = m * v
  • KE = 1/2 * m^2 * v
  • KE = m^2 * v
  • KE = 1/2 * m * v^2
  • KE = m * v^2

Frage 9

Frage
True or false? A system that stores energy when a vehicle brakes is known as a kinetic energy recovery system.
Antworten
  • True
  • False

Frage 10

Frage
True or false? Momentum is a scalar quantity.
Antworten
  • True
  • False

Frage 11

Frage
Which of these formulae is correct for calculating momentum?
Antworten
  • p = m * v
  • p = m * v^2
  • p = m^2 * v
  • p = 2m * v
  • p = m * 2v

Frage 12

Frage
True or false? In a closed system, the total momentum before an event is equal to the total momentum after the event.
Antworten
  • True
  • False

Frage 13

Frage
Trolley A, 6kg, is travelling in one direction at 4m/s. Trolley B, 7kg, is travelling in the other direction at 3m/s. The two trolleys stick together and move off. What is the velocity of the two trolleys?
Antworten
  • 2.5m/s
  • 3m/s
  • 3.5m/s
  • 4m/s

Frage 14

Frage
True or false? In an explosion, the total momentum is zero.
Antworten
  • True
  • False

Frage 15

Frage
True or false? If, in an explosion, two pieces of debris move apart, they will not move with equal and opposite momentum.
Antworten
  • True
  • False

Frage 16

Frage
True or false? A front-end collision increases the momentum of the car.
Antworten
  • True
  • False

Frage 17

Frage
What does a g-force of 2g mean?
Antworten
  • The force applied on an object is half its weight
  • The force applied on an object is twice the gravitational field strength
  • The force applied on an object is twice its weight

Frage 18

Frage
True or false? If the impact time is increased, the impact force will be increased.
Antworten
  • True
  • False

Frage 19

Frage
Which two of these features of car safety are compulsory by UK law?
Antworten
  • Seat belts
  • Crumple zones
  • Collapsible steering wheels
  • Airbags
  • Side impact bars

Frage 20

Frage
True or false? Child car seats are mandatory in the UK for children younger than 12 years old or shorter than 1.35m.
Antworten
  • True
  • False
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