1) The acceleration of a car is a measure of: a) Its rate of change of distance b) Its rate of change of velocity c) How fast it is travelling d) How high it is travelling 2) A bus travelled a distance of 30 km in 0.5 hours. Its speed was: a) 0.6 km/h. b) 60 km/h. c) 15 km/h. d) 1 km/h. 3) Balanced forces: a) make objects speed up. b) make objects slow down. c) do not change the velocity of moving objects. d) only affect stationary objects. 4) This drawing shows two forces on a car. What will happen to the car? a) It will accelerate. b) It will slow down. c) It will decelerate. d) It's velocity will stay the same. 5) In which region is Hooke's law obeyed? a) A b) B c) C d) None of them 6) What are forces X and Y? a) X is air resistance, Y is weight. b) X is air resistance, Y is friction. c) X is weight, Y is air resistance. d) X is friction, Y is air resistance. 7) The air resistance of a car can be reduced by: a) making the car bigger. b) making the car heavier. c) giving it a streamlined shape. d) putting a roof rack on it. 8) Air resistance on a moving object depends on: a) The mass of the object b) The surface area of the object c) The speed of the object. d) Both the speed and the suface area of the object 9) There are changing forces on a skydiver during a jump. Which of these statements is not true? a) Her weight stays the same. b) Her air resistance stays the same. c) Her air resistance is very small at the beginning of the jump. d) Her air resistance increases as her speed increases. 10) This distance–time graph shows Mrs Martin driving her children to the cinema. Which part of the graph shows where she stopped at some traffic lights? a) V to W b) W to X c) X to Y d) Y to Z 11) A resultant force is: a) Found by adding the size of each force. b) The F in F = ma c) Never zero d) Always acting downwards 12) You have a mass of 50kg. One of your dogs pulls you left with 30N. The other pulls you right with 40N. How do you move? a) You don't move b) Left with acceleration 150 m/s/s c) Right with acceleration 0.2 m/s/s d) Right with acceleration 100 m/s/s 13) What is terminal velocity? a) Exactly 100 mph b) Something only sky divers experience c) The velocity you travel at when your foward force is equal and opposite to your drag force d) It is actually an acceleration 14) Hooke's law states that: a) The spring constant gives the stiffness of a spring. b) Springs only deform elastically. c) Springs only deform plastically d) The extension of an object is directly proportional to the force acting on it. 15) Why is Sam's bike so damn quick? a) It looks cool b) It has little Friction c) It has little Air Resistance d) It has little gerbils running in wheels inside it 16) Why is it safer to wear trainers than flip flops on a wet day? a) They have more air resistance b) They have more friction c) They have less friction d) Otherwise you would look like an idiot 17) A tugboat pulls the ship with a force of 25000 N. The ship does not move because the force of friction acting on it is: a) more than 25 000 N b) exactly 25 000 N c) more than zero but less than 25 000 N d) zero 18) Once the ship is off the beach, the tugboat continues to pull the ship with a force of 25 000 N. The ships acceleration is 2 m/s/s. The mass of the ship is: a) zero b) 12.5 tonnes c) 50,000 kg d) 12.5 kg 19) Deduce what load would be required to produce an extension of 60 mm a) 1.5 N b) 3200 N c) 0.8 N d) 0.9 N 20) What is the spring constant of this spring? a) 0.02 N/mm b) 0.018 N/mm c) 0.025 N/mm d) 5 N/mm
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Forces Revision Test
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