AQA GCSE Combined Science: Trilogy - Physics Paper 2 (Higher) 8464/P/2H [Exam Chat]

What did people get for the how to see the direction of a force in a magnet

i said use the flemmings left hand rule where the thumb is force, the first finger is magnetic field and the second is current but that’s kind of all one point so i’ll prob get one mark - i didn’t know what else to say🙁

The answers to most questions, which are backed by our science teacher

1)rarefaction, wavelength
1.2) 2.5*10 power of -4 units=seconds
1.3)waves speed=frequency *wavelength
1.4)1.16metres
2.1)work done=f d
2.2)80N
2.3)d=s*t
2.4)7.5m/s
2.5)speed increases initially as kinetic energy, however after a specific time, the rate of the competitor begins to slow down,because of frictional force acting toward the competitor from the wheels, this therefore transfers kinetic energy store to thermal energy store. This causes the velocity to decrease, where the resultant force decreases, because the forces acting on the competitor increases as speed increase, so overall there will be a decrease in the speed of the competitor.

3.1)1.2m/s

3.2)the velocity of the train is less after the collision as opposed to before the collision, because initially the momentum was greater, as the momentum before an event=momentum after an event, so initially the train was moving at a quicker rate as the momentum was greater, however after the collision, momentum is transferred to the other object where this caused the train to know obtain a smaller momentum, as energy is transferred to thermal and to the other object, which causes the train to now have less energy therefore less momentum thus lower rate than the beginning.

4.1)because when there is a current in the wire this exerts a magnetic field around the wire, this therefore causes the the magnetic field from the wire to interact with the momentum of the 2 magnets, this interaction causes a force to be exerted
4.2)Flemings left hand rule-you basically had to explain what each of the three fingers represented
4.3)one way to increase the turning coil is to increase current, this will result in a larger stronger magnetic field therefore greater force exerted form the interaction of magneticfields,therefore this increased force causes the coils to turn at a quicker rate
5.1)mistakes-distance between the infrared lamp and the flask (2) to use the same flask type and size
5.2)8 degrees and 24 seconds
5.3)because the graph is steeper or the gradient is greater therefore more rate of infrared radiation
5.4)Infrared energy is felt as heat because it interacts with molecules by exciting them, causing them to move faster which increases the internal temperature of the object absorbing the infrared energy,hovever once all is heated the temp no longer increases it remains constant
6.1)0.7 seconds
6.2)6metes -you had to calculate the gradient by doing 30 divide by 5, not calculating a tangent than gradient, you were suppose to join the two points on the curve and calculate the gradient
6.3)the gradient on the line shows the resultant force on the car wasn't constant, because the velocity was not constant where this means the forces aren't balanced therefore resultant force is not 0.
7.2)12250metres-allot of people fumbled on this question where they got 1.225, this is wrong! (well done if you got this)
7.3) for this question you had to talk about terminal velocity where the opposite forces eventually become balanced in magnitude , so therefore the resultant force is 0 , as the apple is falling at a constant rate at the same direction, terminal velocity is achieved, you had to that use an application from the newtons first law of motion where as speed is constant and in the same direction the resultant force is 0.

ohh finally this took for ever lol...let me know how many questions you got right

The answers to most questions, which are backed by our science teacher

1)rarefaction, wavelength
1.2) 2.5*10 power of -4 units=seconds
1.3)waves speed=frequency *wavelength
1.4)1.16metres
2.1)work done=f d
2.2)80N
2.3)d=s*t
2.4)7.5m/s
2.5)speed increases initially as kinetic energy, however after a specific time, the rate of the competitor begins to slow down,because of frictional force acting toward the competitor from the wheels, this therefore transfers kinetic energy store to thermal energy store. This causes the velocity to decrease, where the resultant force decreases, because the forces acting on the competitor increases as speed increase, so overall there will be a decrease in the speed of the competitor.

3.1)1.2m/s

3.2)the velocity of the train is less after the collision as opposed to before the collision, because initially the momentum was greater, as the momentum before an event=momentum after an event, so initially the train was moving at a quicker rate as the momentum was greater, however after the collision, momentum is transferred to the other object where this caused the train to know obtain a smaller momentum, as energy is transferred to thermal and to the other object, which causes the train to now have less energy therefore less momentum thus lower rate than the beginning.

4.1)because when there is a current in the wire this exerts a magnetic field around the wire, this therefore causes the the magnetic field from the wire to interact with the momentum of the 2 magnets, this interaction causes a force to be exerted
4.2)Flemings left hand rule-you basically had to explain what each of the three fingers represented
4.3)one way to increase the turning coil is to increase current, this will result in a larger stronger magnetic field therefore greater force exerted form the interaction of magneticfields,therefore this increased force causes the coils to turn at a quicker rate
5.1)mistakes-distance between the infrared lamp and the flask (2) to use the same flask type and size
5.2)8 degrees and 24 seconds
5.3)because the graph is steeper or the gradient is greater therefore more rate of infrared radiation
5.4)Infrared energy is felt as heat because it interacts with molecules by exciting them, causing them to move faster which increases the internal temperature of the object absorbing the infrared energy,hovever once all is heated the temp no longer increases it remains constant
6.1)0.7 seconds
6.2)6metes -you had to calculate the gradient by doing 30 divide by 5, not calculating a tangent than gradient, you were suppose to join the two points on the curve and calculate the gradient
6.3)the gradient on the line shows the resultant force on the car wasn't constant, because the velocity was not constant where this means the forces aren't balanced therefore resultant force is not 0.
7.2)12250metres-allot of people fumbled on this question where they got 1.225, this is wrong! (well done if you got this)
7.3) for this question you had to talk about terminal velocity where the opposite forces eventually become balanced in magnitude , so therefore the resultant force is 0 , as the apple is falling at a constant rate at the same direction, terminal velocity is achieved, you had to that use an application from the newtons first law of motion where as speed is constant and in the same direction the resultant force is 0.

ohh finally this took for ever lol...let me know how many questions you got right

The 12250m tree?

yes that's right well done

The answers to most questions, which are backed by our science teacher

1)rarefaction, wavelength
1.2) 2.5*10 power of -4 units=seconds
1.3)waves speed=frequency *wavelength
1.4)1.16metres
2.1)work done=f d
2.2)80N
2.3)d=s*t
2.4)7.5m/s
2.5)speed increases initially as kinetic energy, however after a specific time, the rate of the competitor begins to slow down,because of frictional force acting toward the competitor from the wheels, this therefore transfers kinetic energy store to thermal energy store. This causes the velocity to decrease, where the resultant force decreases, because the forces acting on the competitor increases as speed increase, so overall there will be a decrease in the speed of the competitor.

3.1)1.2m/s

3.2)the velocity of the train is less after the collision as opposed to before the collision, because initially the momentum was greater, as the momentum before an event=momentum after an event, so initially the train was moving at a quicker rate as the momentum was greater, however after the collision, momentum is transferred to the other object where this caused the train to know obtain a smaller momentum, as energy is transferred to thermal and to the other object, which causes the train to now have less energy therefore less momentum thus lower rate than the beginning.

4.1)because when there is a current in the wire this exerts a magnetic field around the wire, this therefore causes the the magnetic field from the wire to interact with the momentum of the 2 magnets, this interaction causes a force to be exerted
4.2)Flemings left hand rule-you basically had to explain what each of the three fingers represented
4.3)one way to increase the turning coil is to increase current, this will result in a larger stronger magnetic field therefore greater force exerted form the interaction of magneticfields,therefore this increased force causes the coils to turn at a quicker rate
5.1)mistakes-distance between the infrared lamp and the flask (2) to use the same flask type and size
5.2)8 degrees and 24 seconds
5.3)because the graph is steeper or the gradient is greater therefore more rate of infrared radiation
5.4)Infrared energy is felt as heat because it interacts with molecules by exciting them, causing them to move faster which increases the internal temperature of the object absorbing the infrared energy,hovever once all is heated the temp no longer increases it remains constant
6.1)0.7 seconds
6.2)6metes -you had to calculate the gradient by doing 30 divide by 5, not calculating a tangent than gradient, you were suppose to join the two points on the curve and calculate the gradient
6.3)the gradient on the line shows the resultant force on the car wasn't constant, because the velocity was not constant where this means the forces aren't balanced therefore resultant force is not 0.
7.2)12250metres-allot of people fumbled on this question where they got 1.225, this is wrong! (well done if you got this)
7.3) for this question you had to talk about terminal velocity where the opposite forces eventually become balanced in magnitude , so therefore the resultant force is 0 , as the apple is falling at a constant rate at the same direction, terminal velocity is achieved, you had to that use an application from the newtons first law of motion where as speed is constant and in the same direction the resultant force is 0.

ohh finally this took for ever lol...let me know how many questions you got right

I'm sorry but that doesn't sound correct for a tree. Imo 1.225 is more plausible.

I’ve got 80 too

omg jeez thankyou, know way i got 12250 lets go boyz , and most of it

The answers to most questions, which are backed by our science teacher

1)rarefaction, wavelength
1.2) 2.5*10 power of -4 units=seconds
1.3)waves speed=frequency *wavelength
1.4)1.16metres
2.1)work done=f d
2.2)80N
2.3)d=s*t
2.4)7.5m/s
2.5)speed increases initially as kinetic energy, however after a specific time, the rate of the competitor begins to slow down,because of frictional force acting toward the competitor from the wheels, this therefore transfers kinetic energy store to thermal energy store. This causes the velocity to decrease, where the resultant force decreases, because the forces acting on the competitor increases as speed increase, so overall there will be a decrease in the speed of the competitor.

3.1)1.2m/s

3.2)the velocity of the train is less after the collision as opposed to before the collision, because initially the momentum was greater, as the momentum before an event=momentum after an event, so initially the train was moving at a quicker rate as the momentum was greater, however after the collision, momentum is transferred to the other object where this caused the train to know obtain a smaller momentum, as energy is transferred to thermal and to the other object, which causes the train to now have less energy therefore less momentum thus lower rate than the beginning.

4.1)because when there is a current in the wire this exerts a magnetic field around the wire, this therefore causes the the magnetic field from the wire to interact with the momentum of the 2 magnets, this interaction causes a force to be exerted
4.2)Flemings left hand rule-you basically had to explain what each of the three fingers represented
4.3)one way to increase the turning coil is to increase current, this will result in a larger stronger magnetic field therefore greater force exerted form the interaction of magneticfields,therefore this increased force causes the coils to turn at a quicker rate
5.1)mistakes-distance between the infrared lamp and the flask (2) to use the same flask type and size
5.2)8 degrees and 24 seconds
5.3)because the graph is steeper or the gradient is greater therefore more rate of infrared radiation
5.4)Infrared energy is felt as heat because it interacts with molecules by exciting them, causing them to move faster which increases the internal temperature of the object absorbing the infrared energy,hovever once all is heated the temp no longer increases it remains constant
6.1)0.7 seconds
6.2)6metes -you had to calculate the gradient by doing 30 divide by 5, not calculating a tangent than gradient, you were suppose to join the two points on the curve and calculate the gradient
6.3)the gradient on the line shows the resultant force on the car wasn't constant, because the velocity was not constant where this means the forces aren't balanced therefore resultant force is not 0.
7.2)12250metres-allot of people fumbled on this question where they got 1.225, this is wrong! (well done if you got this)
7.3) for this question you had to talk about terminal velocity where the opposite forces eventually become balanced in magnitude , so therefore the resultant force is 0 , as the apple is falling at a constant rate at the same direction, terminal velocity is achieved, you had to that use an application from the newtons first law of motion where as speed is constant and in the same direction the resultant force is 0.

ohh finally this took for ever lol...let me know how many questions you got right

could 5.2 be 240 seconds?

unofficial mark scheme: https://vm.tiktok.com/ZMNjXt9MX/?k=1

some points for the very last q might be wrong, so lmk what you guys got

I trust this mark scheme a lot more than the other one.

this one is correct, i made it and peer reviewed it with quite a lot of people, just the last one I don’t really know how to get 4/4

I trust this mark scheme a lot more than the other one.

What do you mean?