Latymer Upper School

PHYS 102

AQA Physics Exam-style mark scheme
Question Answer Marks Guidance
1 a Axes labelled correctly with correct units shown 
Suitable scales 
6 points plotted correctly 
All points plotted correctly 
Both sections of line drawn correctly 
5
1 b i The gradient (of the slope section) represents the deceleration/
calculates 5 m s–2 
(Deceleration is uniform because) the gradient is constant/line
is straight  2
1 b ii Distance travelled = area under line (0 to 3.5 s or 0.5 to 3.5 s)
 (=
15.0 × 0.5) = 7.5 m in first 0.5 s 
(= 0.5 × 15.0 × 3.0) or s =
12
 (u + v) t, etc.) = 22.5 m (from 0.5 s
to 3.5 s) 
(=
12
(0.5 + 3.5) × 15 gets all three method marks)
(Total distance travelled = 7.5 + 22.5) = 30 m 
4
Total 11
From AQA Physics A PHYA2 Mechanics, Materials and Waves mark scheme January 2009 (Question 1)
2 a Gradient (or slope or steepness) is changing 
or graph a curve (or not a straight line)
1
2 b 25 ± 3 m  1
2 c
(Use of speed =
distance
time
gives)
speed =
11
100
speed = 9.1 ± 0.2 m s–1 
1
2 d i Constant acceleration 
or acceleration stays the same