1 An experiment is carried out to find a value for g, the acceleration of free fall.
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1 1 An experiment is carried out to find a value for g, the acceleration of free fall. A weighted card of known length l is dropped through two light gates. The light gates are attached to a data logger and a computer. By inputting the length of the card into the computer two values of velocity and the time interval between them can be obtained. Using these values of velocity, a value of g can be determined. l light gate 1 to data logger and computer light gate 2 Assuming that air resistance is negligible, which of the following would produce a more reliable value of g? A Drop the card from a greater height. B Ensure that the card is dropped from rest. C Make the card shorter. D Move the light gates further apart. 2 Which pair of quantities does not contain a vector and a scalar? A acceleration and time B force and displacement c mass and acceleration D velocity and time (t otal for Question = 1 mark)
2 3 Which of these quantities is not measured in an SI base unit? A distance B force C mass D time 4 Which equation shows a scalar quantity as the product of two vector quantities? A energy = power time B force = stiffness extension C mass = density volume D work = force displacement 5 Which of the following is a scalar quantity? A acceleration B displacement C force D work
3 6 Which of the following units could be used for power? A kg m s 2 B kg m 2 s 2 C kg m 2 s 3 D kg 2 m 2 s 3 7 Which set of quantities is all scalar? A acceleration, displacement, velocity B energy, mass, power C extension, force, gravitational potential energy D weight, kinetic energy, work 8 Physical quantities are either scalars or vectors. Select the row of the table which correctly identifies a scalar quantity and a vector quantity. Scalar Vector A force velocity B mass time C time force D velocity mass
4 9 A student takes measurements for a piece of copper wire. Mass Length Diameter kg 3.36 m m The student uses these values to calculate a value for the density of copper. The correctly calculated value of density is shown on the student s calculator as The student should state the density as A kg m 3 B 8950 kg m 3 C kg m 3 D kg m In which of the following is a vector fully described? A A car travels north. B A crane moves a load 20 m east. C A train travels at a rate of 35 m s 1. D A lift moves upwards with a kinetic energy of 2.5 kj.
5 11 Which of the following is a correct statement? A Weight is a base quantity. B Velocity is a base quantity. C Mass is a derived quantity. D Force is a derived quantity. 12 The main component of a newton meter is a calibrated spring spring The newton meter is to be used over a greater range of forces. Which of the following should be increased to allow this? A ductility of the spring wire B precision of the scale C stiffness of the spring D ultimate tensile strength of the spring
6 13 Which statement about scalar and vector quantities is correct? A Scalars have direction only. B Scalars have distance only. C Vectors have magnitude and direction. D Vectors have magnitude and distance. 14 Which of the following is a unit equivalent to the pascal? A kg m s 1 B kg m s 2 C kg m 1 s 2 D kg m 2 s 2
7 15 Which table is correct for scalar and vector quantities? A has magnitude has a direction scalar vector χ B has magnitude has a direction scalar χ vector C has magnitude has a direction scalar χ vector D has magnitude has a direction scalar vector χ 16 Which of the following is not a unit of energy? A N s 1 B kw h C N m D W s
8 17 Which of the following is a vector quantity? A distance B force C speed D work 18 Which of the following is a scalar quantity? A displacement B force C time D velocity 19 Which of the following is not a SI base quantity? A force B length C mass D time
9 20 The table shows some physical quantities. Which row correctly identifies scalar and vector quantities? Scalar Vector A distance acceleration B time speed C velocity force D work power 21 Which of these units is the same as the newton? A kg m s 1 B kg m s 2 C kg m 2 s 2 D kg m 2 s 3 22 Which pair of quantities does not contain a vector and a scalar? A acceleration and time B force and displacement c mass and acceleration D velocity and time (t otal for Question = 1 mark)
10 23 Which of the following is a derived SI quantity? A force B length c second D watt (t otal for Question = 1 mark) 24 Which of the following is a possible unit for rate of change of momentum? A kg m s 2 B kg m s 1 c N s 1 D N s (t otal for Question 5 = 1 mark) 25 A correct unit for radiant energy flux is A N m 1 s 1 B Nm 1 C W D W m 2
11 26 Which of the following is a possible unit for rate of change of momentum? A kg m s 1 B kg m s 2 C N s D N s 1 27 A unit of electric field strength is A J C 2 B N m 2 C 2 C N m C 1 D N C 1 (Total for Question 4 1 mark)
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