Progression Exam Notes

Question 1

Waves Notes

Question 2

Path Difference
Phase Difference
Interference
Min/Max

Answer 2

Path difference is in terms of wavelengths
Phase difference is the difference in phase (seen as an angle)
Interference is either constructive or Destructive
Constructive forms maxima, destructive forms minima

Question 3

Explanation of how light from a diffraction grating forms maxima on the screen

Answer 3

path difference of …
leads to the phase difference of 0 or 360 degrees
Superposition causes constructive interference, which forms a maxima

Question 4

Deduce which combination will produce the greatest possible number of interference maxima
(https://gyazo.com/269a99d072f133f7d501e1133dbb46a4)

Answer 4

smallest theta (gap between maxima) through a smaller wavelength and larger slit spacing
so Laser pointer A with CD

Question 5

A student predicts that using a certain arrangement, the greatest number of spots on the screen will be 3. Determine whether the student’s prediction is correct
(https://gyazo.com/d98329289dba1efddaf7a6d941c62785)

Answer 5

Use of dsin theta = n lambda
wavelength of 6.36e-7
theta of 45
d of 1.6e-6
gives a number of spots visible as 1.78
students prediction is correct as screen can move up and down, so student can move up or down to see more

Question 6

Notes from Waves questions

Answer 6

Need to remember the order for justifying the number of maxima/minima
Need to read diagrams more in depth, as well as remember equations
Need to remember the difference between path and phase difference
Need to think less rigidly, just because a screen can only hold a certain amount, does not mean it can’t be moved

Question 7

Mechanics Exam Questions

Question 8

Caluclate the work done to bring an object with a mass of 1.1e-9kg and speed of 5.9e3m/s

Answer 8

KE = Wd
KE = 1/2mv^2

Question 9

Calculate the average force acting on the object as it is bought to rest

Answer 9

Wd = F*D
0.019 = F*0.029
F = 0.019/0.029

Question 10

Calculate the mass of a block with a cross sectional area of 8.0cm^2 and a thickness of 3.0cm

Answer 10

Vol = 2.4e-5
P = v * d
2.4e-5 * (5 + 50/2) = 6.6e-2kg

Question 11

Q has the same mass as P
Q travels at the same speed as P
Q is less dence than P

Compare the distance travelled by Q with that travelled by P as they are bought to rest

Answer 11

P has a smaller surface area, so energy concentrated
Q has a larger surface area, so energy less concentrated
Greater concentration of energy = greater distance travelled
P travels further

Question 12

Notes on Mechanics questions

Answer 12

Need to make sure that numbers are only rounded where it makes sense, and not to 1s.f.
Need to make sure I remember the equations Work Done is equal to force * distance
Need to make sure I justify my answers, as fifty/fifties do not give marks

Question 13

Moments Exam Questions

Question 14

U is a force acting at right angles to a pole
Diagram Showing the forces ()

Determine, using a scale diagram, the angle and magnitude of U.

Answer 14

Proper drawing of the scale diagram, so that the forces created match reality
Use of Pythagoras’s theorem to calculate the missing side of the scale diagram
Scale diagram drawn to a predetermined scale (and scale properly shown)