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P4 Quiz
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Perguntas do quiz (25)
1The faster an object moves, the lower the gradient of the line representing it on a distance-time graph.
- AVerdadeiro
- BFalso
2Which line on the graph represents the greatest speed?
- AA
- BB
- CC
3Which line on the graph represents an object travelling with a constant velocity?
- AA
- BB
- CC
4A car travels 100 m in 5 s. What is its average speed?
- A500 m/s
- B0.05 m/s
- C20 m/s
5The velocity of an object is its speed in a particular direction.
- AVerdadeiro
- BFalso
6[blank_start]Acceleration[blank_end] (m/s^2) = change in speed ([blank_start]m/s[blank_end]) / time taken ([blank_start]s[blank_end])
- Am/s
- Bs
- CAcceleration
7Forces occur when there is an [blank_start]interaction[blank_end] between two objects. These forces always happen in [blank_start]pairs[blank_end] – when one object [blank_start]exerts[blank_end] a force on another, it always experiences a force in return. These two forces are an interaction pair. They are [blank_start]equal[blank_end] in size, and [blank_start]opposite[blank_end] in direction. You only have an interaction pair if the forces are [blank_start]caused[blank_end] by the interaction.
- Ainteraction
- Bpairs
- Cexerts
- Dopposite
- Eequal
- Fcaused
8Choose the three statements that, when put together, explain how rocket engines work.
- Aas the fuel burns, exhaust gases are produced
- Bthe rocket engine pushes these gases out backwards
- Cthe gases push the space shuttle forwards, with the same size force in the opposite direction.
- Dthe earth pushed the rocket up
- Egases push down on the ground
9A tennis player hits a ball with a racket. There is a force on the ball from the racket. What is the other force of the interaction pair?
- AThe weight of the ball
- BThe reaction of the player
- CThe force on the tennis racket
10Sometimes a [blank_start]force[blank_end] is produced as a [blank_start]response[blank_end] to another force – these are not the same as interaction pairs.
A book on a table has a downwards force (its [blank_start]weight[blank_end]) due to [blank_start]gravity[blank_end].
This downwards force, pushing on the table, produces an [blank_start]upwards[blank_end] force called [blank_start]reaction[blank_end].- Aforce
- Bresponse
- Cweight
- Dgravity
- Eupwards
- Freaction
11They are not an interaction pair, because the weight of the book is caused by the Earth's gravity, not by the table.
- AVerdadeiro
- BFalso
12Which is the action/reaction in this interaction pair?
- Aaction
- Breaction
13The resultant force is the overall result of all forces acting on an object.
- AVerdadeiro
- BFalso
14Which of the following statements is false?
- AIf the driving force is greater than the counter forces, there is a resultant force forwards. This will make the car speed up
- BIf the driving force is less than the counter forces, there is a resultant force backwards. This will make the car slow down
- CIf the driving force is the same as the counter forces, and the car is moving, it will stop.
15If a ball is released from a [blank_start]height[blank_end] then forces begin to act on it. It will start to [blank_start]fall[blank_end] due to the force of [blank_start]gravity[blank_end] acting on it. The ball will begin to [blank_start]accelerate[blank_end] (its speed increases).
If an object is dropped that is [blank_start]light[blank_end] relative to its size, like a [blank_start]feather[blank_end], it will speed up when released at first but then fall at a steady speed. This is due to air [blank_start]resistance[blank_end].
The [blank_start]faster[blank_end] an object moves, the greater the force of air resistance on it becomes. The light object will reach a steady speed when the force of air resistance [blank_start]balances[blank_end] out the force of gravity.- Aheight
- Bfall
- Cgravity
- Daccelerate
- Elight
- Ffeather
- Gresistance
- Hfaster
- Ibalances
16Momentum (in kg [blank_start]m[blank_end]/[blank_start]s[blank_end]) = mass (in [blank_start]kg[blank_end]) × [blank_start]velocity[blank_end] (in m/s)
Change of [blank_start]momentum[blank_end] (in kg m/s) = resultant [blank_start]force[blank_end] (in newton, [blank_start]N[blank_end]) × [blank_start]time[blank_end] for which it acts (in [blank_start]s[blank_end])- Am
- Bs
- Ckg
- Dvelocity
- Emomentum
- Fforce
- GN
- Htime
- Is
17What safety measures in cars reduce the momentum of the vehicle/passengers in the event of a crash?
- ASeat belts
- BAir bags
- CCrush zones
- DAll of the above!
18A force of 100 N acts on an object for 4 seconds. What is the momentum change of the object?
- A50 kg m/s
- B104 kg m/s
- C400 kg m/s
19Amount of energy transferred (joule, J) = work done (joule, J)
- AVerdadeiro
- BFalso
20How much work is done on the box?
- A20J
- B50J
- C0.2J
21If you lift a book up onto a shelf you have to do work [blank_start]against[blank_end] the force of gravity. The book has [blank_start]gained[blank_end] gravitational [blank_start]potential[blank_end] energy. Any object that is raised against the force of gravity has an [blank_start]increase[blank_end] in its gravitational potential energy.
Change in GPE ([blank_start]J[blank_end]) = weight ([blank_start]N[blank_end]) x change in [blank_start]height[blank_end] ([blank_start]m[blank_end])- Aagainst
- Bpotential
- Cincrease
- Dgained
- EJ
- FN
- Gm
- Hheight
22What is the kinetic energy of a 2 kg dog running at 6 m/s?
- A72 J
- B36 J
- C12 J
23Kinetic energy = 1/2 × mass × speed^4
- AVerdadeiro
- BFalso
24When the pendulum bob is at the [blank_start]start[blank_end] of its swing it has no kinetic energy because it is not moving, but its [blank_start]gravitational[blank_end] potential energy (GPE) is at a [blank_start]maximum[blank_end], because it is at the highest point.
As the bob swings [blank_start]downwards[blank_end] it loses height. So its gravitational potential energy (GPE) [blank_start]decreases[blank_end]. The work done on the bob by the gravitational force ([blank_start]weight[blank_end]) pulling it downwards increases its [blank_start]kinetic[blank_end] energy. The loss of GPE = the [blank_start]gain[blank_end] in KE.
At the bottom of its swing, the bob's kinetic energy is at a maximum and its gravitational potential energy is at a [blank_start]minimum[blank_end] - because it is at its lowest point.
As the bob swings upwards it [blank_start]slows[blank_end] down. Its kinetic energy decreases as work is done [blank_start]against[blank_end] its weight. As it gains height the gravitational potential energy [blank_start]increases[blank_end] again.
At the very top of its swing it [blank_start]stops[blank_end] for a moment. It once again has [blank_start]no[blank_end] kinetic energy, but its gravitational potential energy is at a maximum.
At all points during the swing, the total (GPE + KE) is [blank_start]constant[blank_end].
Note that in a real pendulum the bob's swing will become slightly [blank_start]lower[blank_end] with each swing, because some energy is lost ([blank_start]dissipated[blank_end], 'wasted') through heating, due to air [blank_start]resistance[blank_end].
- Astart
- Bgravitational
- Cmaximum
- Ddownwards
- Edecreases
- Fweight
- Gkinetic
- Hgain
- Iminimum
- Jslows
- Kagainst
- Lincreases
- Mstops
- Nno
- Oconstant
- Plower
- Qdissipated
- Rresistance
25A flower pot weighing 5 N falls off a windowsill 10 m above the ground. What is its kinetic energy just before it hits the ground?
- A250 J
- B50 J
- C2 J
Informações
- Descrição
- GCSE Physics (P4 - Explaining Motion) Quiz sobre P4 Quiz, criado por Leah Firmstone em 26-11-2015.
- Autor
- Leah Firmstone
- Idioma
- English
- Visualizações
- 9
- Etiquetas
- Avaliação
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