Moment marking Scheme

- Mark Scheme /


Question Answer Marks AO Element Notes Guidance

1 (perpendicular) distance (from 2
pivot) of F decreases / is less
(than 0.75 m) OR
(perpendicular) distance (from
pivot) of W increases / is more
(than 0.75 m) (1)
(so) increased / greater (force
F) (needed for greater moment)
(1)

2 (sum of) clockwise moments = 4
(sum of) anticlockwise moments
(1)
200 = (2.0 × 10) + (F × 60) (1)
= (200 – 20) ÷ 60 OR
180 ÷ 60 (1)
(F =) 3.0 (N) (1)

3 moment = force × distance from 5
pivot in any form (1)
(distance of force from pivot =
(25 – 10) =) 15 (cm) (1)
8 × 15 (1)
120 (1)
N cm (1)

, - Mark Scheme /


Question Answer Marks AO Element Notes Guidance

4 moment = force × 3
(perpendicular) distance (from
pivot) (1)
700 × 3.5 (1)
2450 (N m) (1)

5(a) 1. down arrow labelled W at 2
dashed line on 50 cm mark (1)
2. up arrow labelled R at pivot
(1)

5(b) expression / evaluation for one 4
correct moment seen (1)
expressions / evaluation for all
correct moments seen (1)
equation seen relating correct
expressions / evaluations for
moments:
moment of 0.5 N + moment F =
moment of W OR
90 F = 43 OR
0.9F = 0.43 (1)
(F = OR 0..9 =)
0.48 N (1)

5(c) upwards force = downwards 2
force (1)
(R =) 1.2 N (1)