1 (a) (i) 8m 1
(ii) 8m 1
(iii) 8m 1
(b) (i) 16m 1
(ii) 16m 1
(c) Thinking distance does
not depend on these
factors (brakes, tyres or steering). 1
Thinking distance does depend on speed.
1
Total 7
2 (a) 14m 1
(b) (i) Braking distance is
longer. 1
(ii) Braking distance is
longer (because of
skidding). 1
Total 3
3 (a) 6m 1
(b) Braking distance more
than doubles. 1
Total 2
4 (a) Stopping distance = 9
+ 15 = 24m 1
(b) 24/4 = 6 car lengths.
1
Total 2
5(a) Axes labelled and at
least half the paper used. 1
Points plotted correctly to give y =
x2
by eye. 1
Smooth curve of best fit. (NOT
dot-to-dot.) 1
(b) (i) 8 ±2m 1
(ii) 30 ±2m 1
(c) Braking distance
approximately quadruples. 1
Total 6
6 (a) The empty van. 1
(b) Because it has less
mass. 1
(c) The van carrying
bricks. 1
Total 3
7(a) Mass does not affect
thinking distance. 1
(b) Mass increases braking
distance. 1
(c) Stopping distance
increases because braking
distance increases. 1
Total 3
