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Physics Paper 2 > questions exam > Flashcards

questions exam Flashcards

1
Q

3 factors causes total stopping distance car to be greaer

A
  • driver reaction time slower due to tiredness
    -poor weather condition due to rain
    -poor weather due to icy
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2
Q

How does feeling sleepy likely to affect drivers reaction time

A

it increases it

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3
Q

why driver drink alchol is likely to increase chance of being in accident

A

bceause the driver reaction time increases
(or cuase slower reaction time).

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4
Q

why does the spring get longer when the electromagnet is switched on

A

electromagnet exert a downward force on the iron bar

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5
Q

why did student use transparent block and not opqaue object

A

light will pass through an transparent block

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6
Q

simlarities of convex and concave lens

A

both are deminished

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7
Q

method use to compare the infrared radition emitted from the vertical surface cube

A

Pour hot water into the hollow metal cube, then point the infrared detector of each side and take reading. During this, keep the detector the same distance from each surface

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8
Q

Method use to investiagte how speed of a wave on a strched spring depend on tension in string

A

First add water from the string and adjust the frequenecy using the signal generator. Also, make the wooden bridge. Then, observe a steady pattern and measure the wavelength. Lastly calcultae wave spped from frequency of wavelemgthh.

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9
Q

Driver see haqzard on road and use brakes to stop. Expalain the factor that affect the distance needed to stop a vehilce in emergencey

A

By condition on road surface as wet/icy road, and conditon of tyres of worns tyres and brales. These cause affect on friction by reduce between tyre and road, and increase braking this causes kinetic energy increase speed.

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10
Q

Give 1 simialrties and difference between orbit of earth moon and international space station

A

similar- both have cirucular orbit
differ- both have different orbital period

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11
Q

sun emits visble light, student concludes that visbile light is not abosrbed by the ozone layer. Tell one piece of evidence that show correct

A

our human eyes detect visble light so it must come through the ozone.

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12
Q

why does atmospheric pressure decrease as the student climbs higher

A

density of the air decrease and the mass of air above student decrease.

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13
Q

battery electric car need recharge. suggest 2 factor that affect the distance an electric car can travel before need rechargeing

A

capacity of battery and speed

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14
Q

describe method the student could have used to obtain result on raya box to shine a ray of light through air into glass block

A
  1. place a glass block on peice of paper
  2. draw around the glas block
  3. usea ray box to shine a ray of light through glass box
    4.mark where ray of light enters and emerges from glass box.
  4. remove glass box
  5. join the points to show the pattern
  6. draw a normal line at 90degree to surface
  7. use protractor to measure angle of incidence and reflection
  8. repet method by shining the ray box at different angle of incidence
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15
Q

slide is plastic, why does child become electrically charge when he goes down the slide

A

friction between child clothign and slide cause elctron transfer as 2 insulators are rubbed together.

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16
Q

state one factor that affetcs the braking distance of the car

A

weather conditon - wet/icy road

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17
Q

why and how does the kinetic energy of skier change as accerlate down the slide

A

increase gravitional potential energy to transofrmed to kinetic energy

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18
Q

what is kN worth
3kN=

A

3000

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19
Q

Student remove each piece of modelling clay from oil before dropping the next piece WHY

A

so that they dont build up at the bottom and all the peices fall the same distance

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20
Q

Describe how to use compass to plot the magnetic field pattern around bar magent

A
  1. Place bar magnet and compass on a peice of paper
  2. Mark where compass points to
  3. Keeping magnet in same place, move compass to marked point
    4.Repet these steps until go back to magnet
  4. Join up all the points
  5. add arrow in direction from north to south pole
  6. repet steps for above and below the bar magnet
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21
Q

how is velocity different to spped of aircraft when it travles constant velocity

A

velocity also includes direction

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22
Q

air is taken into the front of the engine and pushed out of the engine, explain the effect this has on egnine

A

a equal force from the air pushes on the engine in the opposite direction

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23
Q

describe lifecycle of star much more massive than the sun

A
  1. stars initially form from a cloud of dust and gas called nebula
    2.the force of gravity pulls the dust and gas together to form a protostar
  2. this provides enough thermal energy for the fusion og hydrogen nuclei to form helium nucli
  3. when outward pressure of nuclear fusion equals to the gravity pulling eveything inwards it is called main sequence star
  4. when hydrogen starts to run out, helium nuclei begin to fuse to form heavier elements up to iron and the star expand to form red super giant
  5. the star will eventually collapse and explode in a supernova
  6. this creates elememnts heavier than iron and distrivute them throughout universe
  7. this leaves bheind a neutron star or a black hole
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24
Q

method of force applied to spring and extension

A
  1. set up equipmnet as shown
  2. measure length of spring before place 1N weight on it
  3. Add 1N weight
  4. Now use metre ruler to measure the new length of spring
  5. Calculate extension of spring
  6. Add more weights to the spring increasing of 1N
  7. Each time record extension of spring until 5N.
25
ramp differ angle short and long ramp. Explain one advatge of use long ramp compare to small ramp
long ramp is at smaller angle so less force is needed to get up the ramp.
26
student tested three people, mean distance was 12.8 Why if all people who took the test may not be 12.8 mean distance
Three students tested are not typical
27
compare the model of solar system used now with the old model of solar system
similarities - -Both model they orbit the moon, and planet in circular. -The moon orbits the earth and there is only one sun. Differences - - in current model, planets orbit the sun whereas old planet orbit earth. -There is shown of dwarf planet, whereas old model no dwarf planet. -And 2 more planets.
28
wavelentgh of transverse wave -
wavelength = Q
29
amplitude of transverse wave -
amplitude = R divide 2
30
why is it important that new scientific observations are peer reviewed?
to check the observations are correct
31
give 2 ways that imaged formed by convex lens(larger, point up), is similar to image concave lens
upright virtual
32
in tranverse wave, the direction of oscilloscope is .....
perpendicular to direction of energy transfer by wave
33
describe method to test, the black-coloured flask will emit more infrared radiation than the silver-coloured flask during 10mins of cooling. EQUIP - SILVER FLASK, BLACK FLASK, KETTLE COLD WATER
1. heat wtaer in kettle 2. add an equal volume of hot water to each flask 3. insert a thermoter to each flasj 4. record the inital reading from tempt of thereometer 5. start stopclock 6. record tempt after 10mins from both flask 7. calculate change in tempt + compare the results to test hypothesis
34
when will flask emit infrared radition at the greatest rate and why - 1st/5th/9th min
1st cis there is greatest tempt difference between hot water and surrouding
35
describe what happen after main sequence of star become black dwarf
1. star expand to become red super giant 2. heavier elements are formed by fusion 3. star shrinks to become a white dwarf 4. star cools and stop emitting enrergy
36
describe what happens to star much bigger than sun after main sequence period
1. the star expands to form a red supergiant 2. outer layers explosde as a supernova 3. elemts heavier than iron are formed 4. become a nuetron star 5. if mass larger enough it forms a black hole.
37
car stops as see fallen tree on road. explain what happen to brake distance if the spped doubles
double speed increase kinetic energy, kinetic energy increase by factor of 4. So work done by brakes to stop the car increase
38
what is difference between distance and displacement
distance is scalar, and displacement is vector.
39
total momentum of the 2 cars was not conserved. what does this mean
momentum before does not equal to momenutum after.
40
scientists want to develop seat belt that produce constant force throughout collision. Use idea of momentum why this is better for driver
reduce momenutum of drive so a smaller constnt force would be needed.
41
as aircraft moves, accerlation decrease even though the force is constant, why
as spped increases, air reistance increase. so resultant force is low
42
explain how london eye wheel can move at steady speed. capsules accerlate same time
velocity has direction , and accerlation occurs when the direction of each capsules changes.
43
another factor that can affect resultant force, and what effect it has on LONDON EYE WHEEL
greater the radius, the smaller the resultant force required
44
3 factors could cause total stoppoing distance to be greater
icy road on poor road condition. worn tyres. poor weather conditons raining
45
what happens when : force are increased as pull thin strip of plasticine... and when force are removed....
plastcinine stretches, and stays stretched
46
what happens when : force increasred as push force on strong metal spring..... when force removed...
spring compresses, and return to orginal length
47
what happens when : force are increase as push force on thin plastic rubber.... when force removed..
ruler bends, and return to orginal shape.
48
why this statment wrong ' it will be much safer because driver can react much faster when driving faster than on road mile'
reaction time of driver does not depdend on speed of car
49
local council must decide whether to introduce lower spped limit - what evidence should council collect
monitor number of accident before and after speed limit. and record number of vehicles.
50
student adjusted the ruler to make it vertical, why important (FORC 1 EXPERIEMENT - force and extension on sprng)
to reduce error in measuring the extension of the spring. As ruler of angle would make the measured extension shorter.
51
state 2 ways in whch shape of spring has change as extended
longer and increase gap between coil
52
what happens to kinetic energy of bus as it is braking
kineitc energy transferred by heating to the brakes.
53
applying brakes of the car cause the temperature of brakes increase, why
work done by friciton between brakes and wheels. causes decrease in kinetic energy and increase thermal energy
54
2 ways increase spanner turn effect
longer spanner and use greater force
55
use idea of moment to explain what happeens when child B move closer to pivo on see-saw. As child A and B are sat normlly
the clockwise moment of child B decreases making it less than the anticlockwise moment of child A. so child A move downwards
56
how could person lifting end of pole increase moment
increase the force exerted
57
use longer steel bar would be easier to remove tree stump why
force is applied further from the axis of rotation. so this increase moment of force
58
child pushes the brick to make it tilt. how far must the brick be tilted to fall over
line of action is outside baseline of brick

Physics Paper 2 (5 decks)

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