M1. (a) increases 1. increases 1. (c) (i) all points correctly plotted all to ± ½ small square one error = 1 mark two or more errors = 0 marks 2
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1 M. (a) increases increases (b) 3 (m) accept 43 circled for mark accept for mark (c) (i) all points correctly plotted all to ± ½ small square one error = mark two or more errors = 0 marks line of best fit correct value from their graph (± ½ small square) (d) (i) 70 ½ 35 4 gains marks attempt to estimate area under the graph for mark 3 line from (0.6,35) Page
2 sloping downwards with a less steep line than the first line cutting time axis at time > 4.6 s accept cutting x-axis at 6 (e) (i) gains mark kgm / s Ns (N) / 4 gains mark alternatively: a = 35 / 4 = 8.75 m / s F = [9] Page 3
3 M. (a) (i) as one goes up so does the other or (directly) proportional accept change by the same ratio steeper straight line through the origin judge by eye (iii) Yes with reason eg data would have been checked / repeated accept produced by a reliable/ official/ government source do not accept it needs to be reliable or No with reason eg does not apply to all conditions / cars / drivers or are only average values or Maybe with a suitable reason eg cannot tell due to insufficient information (b) (i) stopping distance = thinking distance + braking distance any two from: factors must be to do with increasing braking distance smooth road / loose surface rain / snow / ice accept wet road/ petrol spills do not accept condition of road unless suitably qualified badly maintained brakes accept worn brakes accept bad/ worn/ rusty brakes do not accept old brakes Page 4
4 worn tyres accept bald tyres accept lack of grip on tyres do not accept old tyres downhill slope/gradient heavily loaded car [6] Page 5
5 M3. (a) A constant speed / velocity accept steady pace do not accept terminal velocity do not accept stationary B acceleration accept speeding up C deceleration accept slowing down accept accelerating backwards accept accelerating in reverse do not accept decelerating backwards (b) (i) the distance the car travels under the braking force accept braking distance speed/velocity/momentum (c) (i) 5000 (N) to the left both required accept 5000(N) with the direction indicated by an arrow drawn pointing to the left accept 5000(N) in the opposite direction to the force of the car (on the barrier) accept 5000(N) towards the car to measure/detect forces exerted (on dummy / driver during the collision) Page 6
6 (iii) 4 allow mark for showing a triangle drawn on the straight part of the graph or correct use of two pairs of coordinates m/s do not accept mps [0] Page 7
7 M4. (a) (i) gravitational potential (energy) kinetic (energy) (b) (i) slope or gradient area (under graph) do not accept region (iii) starts at same y intercept steeper slope than original and cuts time axis before original the entire line must be below the given line allow curve (c) (i) 3 and 3 correct answers to significant figures gains 3 marks even if no working shown both values to more than significant figures gains marks: /. and / or 80 /.6 gains mark if incorrect answers given but if both are to significant figures allow mark 3 student incorrect because Page 8
8 student correct because average velocities similar ecf from (c)(i) student 3 incorrect because times are different [] Page 9
9 M5. (a) gravitational / gravity / weight do not accept gravitational potential (b) accelerating accept speed / velocity increases the distance between the drops increases but the time between the drops is the same accept the time between drops is (always) 5 seconds accept the drops fall at the same rate (c) (i) any one from: speed / velocity (condition of) brakes / road surface / tyres weather (conditions) accept specific examples, eg wet / icy roads accept mass / weight of car friction is insufficient reference to any factor affecting thinking distance negates this answer allow mark for correct substitution, ie provided no subsequent step shown or allow mark for an answer 75or allow marks for 75 k(+ incorrect unit), eg 75 kn joules / J do not accept j Page 0
10 an answer 75 kj gains 3 marks for full marks the unit and numerical answer must be consistent [8] Page
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![[1] In your answer, you should use appropriate technical terms, spelled correctly.... A satellite. Fig. 4.1](/thumbs/77/76427947.jpg "[1] In your answer, you should use appropriate technical terms, spelled correctly.... A satellite. Fig. 4.1")
1 (a) Define the following terms: couple... [1] torque of a couple. In your answer, you should use appropriate technical terms, spelled correctly.... [1] (b) Fig. 4.1 shows a satellite in space moving
(1) (3)
1. This question is about momentum, energy and power. (a) In his Principia Mathematica Newton expressed his third law of motion as to every action there is always opposed an equal reaction. State what
In which row is the size of the vector equal to the size of the scalar?
1 Each row contains a vector and a scalar. In which row is the size of the vector equal to the size of the scalar? vector displacement of a car velocity of a car velocity of a car weight of a car scalar
4. The diagram below shows a 4.0-kilogram object accelerating at 10. meters per second 2 on a rough horizontal surface.
1. An 8.0-newton wooden block slides across a horizontal wooden floor at constant velocity. What is the magnitude of the force of kinetic friction between the block and the floor? A) 2.4 N B) 3.4 N C)