QUESTIONSHEET 1

(a) 750 MJ / 750,000,000 J 1 2

½ ´ 150,000 ´ 100² 1

(b) engine thrust / jet thrust 1 1

weight of plane / downward force of plane due to gravity 1

(c) 500,000 ´ d = 750 000 000 1

d = 1500 m 1 + 1 (units)

TOTAL / 7

QUESTIONSHEET 2

(a) 80 N in the direction of motion / 80 N forward. 1

(b) work done = force ´ distance 1 1

1600 1 1

J 1 1

(c) (i) 300 J 1 1

(ii) the sledge falls / slides down the hill 1 1

potential energy converted to kinetic energy. 1 1

TOTAL / 7

QUESTIONSHEET 3

(a) Terminal velocity 1 1

(b) Air resistance and gravity 1 1

(c) Air resistance reduces 1 1 Gravity remains constant 1

Gravity remains constant 1

Resultant force/ unbalanced so acceleration. 1 1

(d) (i)

Graph

2/3rds of paper used and correct axis 1 1

Majority of correct points plotted. 1 1

Anomalous result at 40secs not included in line. 1

Smoothed line/ curve of best fit used. 1 1

(ii) Gradient calculated using straight line values between 10-15 secs 1 1

Accept answer 25-75 m/s 1 1

TOTAL / 10

QUESTIONSHEET 4

(a) speed = distance/time 1 1

(b) 200 / 19.32 1 1

= 10.35m/s 1 1

(c) ½ ´ final speed ´ time 1 1 ½ x 7.5 x 2 1

½ ´ 7.5 ´ 2 1

= 7.5 m 1 1

(d) speed / time 1 1

7.5 / 2 1 1

= 3.75m/s² 1 1

TOTAL / 9

QUESTIONSHEET 5

(a) 2000 m 1 1

(b) Alecia 1 1

(c) Alecia has stopped 1 1

(d) 500 1 1 ½ x 10 x 1 1

400

= 1.25 ms^-1 1 1

(e) Dina overtakes Alecia 1 1

(f) Dina 1 1

(g) 2000 1 1

800

= 2.5 ms^-1 1

TOTAL / 9

QUESTIONSHEET 6

(a) 1.2 s 1 1

(b) deceleration= change in velocity/time 1 1

= 27 / 4.2 1 1

= 6.43 m/s² 1 1

(c) distance in 1st 1.2s = velocity ´ time 1 1

= 27 ´ 1.2 1 1

= 32.4 m 1 1

distance until car stops = (27 ´ 4.2) / 2 1 1

= 56.7 m 1 1

total = 32.4 + 56.7 = 89.1 m 1 1

TOTAL / 10

QUESTIONSHEET 7

	x

(a)

	3
	1

x

			20	30
	10
		Time/ s

sensible scales 1 1

correct plotting 1 1

correct lines drawn 1 1

(b) (i) average acceleration = change in velocity / time 1

= 0.5 / 5 1 1

= 0.1 m/s² 1 1

(ii) (3 – 2) / 5 1 1

= 0.2 m/s² 1 1

(iii) As the man pulls the lorry, he is able to accelerate more once the lorry gets moving 1 1

TOTAL / 9

QUESTIONSHEET 8

(a) speed=distance/time 1 1

(b) (i) 100 / 9.96 1 1

= 10.04 m/s 1 1

(ii) 100 / 12 1 1

= 8.33 m/s 1 1

(iii) any viable reason:

better diet/training technique improved in 100 years/

better footwear 1 1

(c) (i) 100 / 40.2 1 1

= 2.49 m/s 1 1

(ii) resistance of water slows swimmer 1 1

TOTAL / 9

QUESTIONSHEET 9

(a) constant speed/constant velocity. 1 1

(b) 1 ms^-2: . 2

answer – 1, units – 1 2

(c) region c: deceleration from 20 to 10 ms^-1 in 5 sec 1

region d: constant speed of 10 ms^-1 for 20 sec 1

region e: deceleration from 10 to 0 ms^-1 in 15 sec 1

(note: 1 mark for correct description for all 3 regions, but no quoted figures.)

(d) Bus stop, traffic jam. 1 1

TOTAL / 7

QUESTIONSHEET 10

(a) (i) 0.9m 1 1

(ii) 0.3s 1 1

(iii) 1.6m 1 1

(b) conversion of 40kg to 400N. 1 1

360 J 1 1

TOTAL / 5

QUESTIONSHEET 11

(a) 420 ´ 3 = potential energy gained

potential energy ¸ 3seconds = power = 420 W 1 1

(b) Potential energy converted to kinetic energy. 1 1

(c) 140 ´ 3 = 420 J

working – 2, correct answer with units –1 3 3 3

(d) 560 ´ 3 = 420 ´ time 1 2 2

t = 560 ´ 3 = 4 seconds 1

420

TOTAL / 7

QUESTIONSHEET 12

(a) (i)

Speed (ms^-1)

Time (s)

correctly plotted points 1 1

line joining points. 1 1

(ii) Rope fully stretched so speed changes from

60ms^-1 to 0 / speed changes from 60ms^-1 to 0. 1

(b) (i) formula: deceleration = change in speed 1 1

time

correct answer with units: 60 ms^-2 1 1

(ii) Upward force in the elastic 1 1

(c) (i) formula: acceleration = change in speed 1 1

time

correct answer with units: 10 ms^-2 1 1

(ii) force 1 1

of gravity 1

TOTAL / 10

QUESTIONSHEET 13

(a) 10 km 1 1

(b) formula: speed = distance 1

time 1

correct answer: 1 km min^-1 / 60 kmh^-1 1 1

(c) (i) car is standing still / stationary 1 1

(ii) formula: speed = distance 1

time 1

correct answer: 1.5 km min^-1 / 90 km h^-1 1 1

(d) use of re-arranged formula: time = distance 1

speed 1

correct calculation of time for BC: 6 min 1 1

correct final answer: 12 min 1 1

TOTAL / 9

QUESTIONSHEET 14

(a)

	15
		10
						x
				5
									30
					10		20				40	50	60
										Time/ s

sensible scales 1 1

correct plotting 1 1

correct lines drawn 1 1

(b) ½ ´ final velocity ´ time 1 1

½ ´ 15 ´ 30 1 1

= 225 m 1 1

(c) moving at constant speed 1 1

(d) (i) line drawn from end of graph to ´ axis at 75 s 1

(ii) change in velocity / time 1 1

= 20 / 15 1 1

= 1.33 m/s² 1 1

TOTAL / 11

QUESTIONSHEET 15

(a) (i)

x

	14
			122
		1010
				8
					6

4

	2		3	4	5	6
		Time/ s

sensible scales 1 1

correct plotting 1 1

correct lines drawn 1 1

(Continued...)

QUESTIONSHEET 15 CONTINUED

(ii) speed/time 1 1

= 15/5 1 1

= 3m/s² 1 1

(iii) ½ ´ final speed ´ time 1 1 ½ x 15 x 5 1

½ ´ 15 ´ 5 1

= 37.5 m 1 1

(b) (i) line parallel to time axis 1 1

(ii) anywhere on last line sloping down 1 1

TOTAL / 11

QUESTIONSHEET 16

(a) speed=distance/time 1 1

=15 / 0.6 1 1

=25m/s 1 1

(b) 63 –15 = 48m 1 1

(c) none 1 1

(d) Two from

mass of car, friction surfaces e.g. brakes,

road condition, tyres 2 2

TOTAL / 7

QUESTIONSHEET 17

(a)

Deduct one mark for each incorrectly plotted point 3

(b) (i) Kris: 4 ms^-1 1 1

Joshua: 3 ms^-1 1 1

average speed = distance 1

time 1

(ii) Kris’s car 1 1

(c) kinetic energy to heat and sound. 1 1

TOTAL / 8

QUESTIONSHEET 18

(a)

30

20

10
									100
								90
		10		30	40		80
			20

sensible scales 1 1

correct plotting 1 1

correct lines drawn 1 1

(b) 50 mph 1 1

(c) (i) distance travelled while reacting 1 1

(ii) distance travelled while braking 1 1

(d) Two from

wet roads, driver may have drunk alcohol, driver tired,

bald tyres 2 2

TOTAL / 8

QUESTIONSHEET 19

(a) Gravity/ weight 1 1

(b) stays the same. 1 1

(c) Write answers are:-

(i) Unbalanced 1 1

(ii) Unbalanced 1 1

(iii) Balanced 1 1

(d) Constant/ steady/ same speed 1 1

(e) Stage 1: Acceleration 1 1 Resultant force is downward 1

Resultant force is downward 1

Stage 2: Acceleration 1 1

Resultant force is upward. 1 1

TOTAL / 10

QUESTIONSHEET 20

(a) 40m/s 1 1

(b) (i) train travelling at 40m/s (constant speed) 1 1

(ii) train decelerates 1 1

(c) B 1 1

(d) distance = speed ´ time 1 1

time = 200 – 50 s 1 1

distance = 40 ´ 150 1 1

= 600 m 1 1

TOTAL / 8