Test
AQA GCSE Physics Unit 2.3
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Preguntas del test (20)
1True or false? Work is done when an object is moved by a force.
- AVerdadero
- BFalso
2True or false? Work uses a different SI unit to energy.
- AVerdadero
- BFalso
3Into which form of energy does most energy become when work is done to overcome friction?
- AThermal
- BElectric
- CSound
4True or false? Gravitational potential energy is energy stored in an object because of its position in the Earth's gravitational field.
- AVerdadero
- BFalso
5What is the gravitational potential energy of an object of 0.5kg mass if it is lifted by 3m?
- A1.5J
- B3J
- C15J
- D10.5J
6What is the power developed of an object which, when lifted, gains 60J in 10s?
- A600W
- B6W
- C60W
7True or false? Kinetic energy is the energy of an object when it is stationary.
- AVerdadero
- BFalso
8Which of these is the correct formula for kinetic energy?
- AKE = 1/2 * m * v
- BKE = m * v
- CKE = 1/2 * m^2 * v
- DKE = m^2 * v
- EKE = 1/2 * m * v^2
- FKE = m * v^2
9True or false? A system that stores energy when a vehicle brakes is known as a kinetic energy recovery system.
- AVerdadero
- BFalso
10True or false? Momentum is a scalar quantity.
- AVerdadero
- BFalso
11Which of these formulae is correct for calculating momentum?
- Ap = m * v
- Bp = m * v^2
- Cp = m^2 * v
- Dp = 2m * v
- Ep = m * 2v
12True or false? In a closed system, the total momentum before an event is equal to the total momentum after the event.
- AVerdadero
- BFalso
13Trolley 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?
- A2.5m/s
- B3m/s
- C3.5m/s
- D4m/s
14True or false? In an explosion, the total momentum is zero.
- AVerdadero
- BFalso
15True or false? If, in an explosion, two pieces of debris move apart, they will not move with equal and opposite momentum.
- AVerdadero
- BFalso
16True or false? A front-end collision increases the momentum of the car.
- AVerdadero
- BFalso
17What does a g-force of 2g mean?
- AThe force applied on an object is half its weight
- BThe force applied on an object is twice the gravitational field strength
- CThe force applied on an object is twice its weight
18True or false? If the impact time is increased, the impact force will be increased.
- AVerdadero
- BFalso
19Which two of these features of car safety are compulsory by UK law?
- ASeat belts
- BCrumple zones
- CCollapsible steering wheels
- DAirbags
- ESide impact bars
20True or false? Child car seats are mandatory in the UK for children younger than 12 years old or shorter than 1.35m.
- AVerdadero
- BFalso
Información
- Descripción
- Twenty questions on the third section of Unit 2 of AQA GCSE Physics: Work and energy.
- Autor
- Matthew T
- Idioma
- English
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- 1.001
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