Working as a Physicist

Question 1 of 20

1. Which pair of quantities does not contain a vector and a scalar?

acceleration and time

force and displacement

mass and acceleration

velocity and time

Question 1 of 20

Question 2 of 20

2. Which of these quantities is not measured in an SI base unit?

distance

force

mass

time

Question 2 of 20

Question 3 of 20

3. Which equation shows a scalar quantity as the product of two vector quantities?

energy = power x time

force = stiffness x extension

mass = density x volume

work = force x displacement

Question 3 of 20

Question 4 of 20

4. Which of the following is a scalar quantity?

acceleration

displacement

force

work

Question 4 of 20

Question 5 of 20

5. Which of the following units could be used for power?

kg m s-2

kg m2 s- 2

kg m2 s 3

kg2 m2 s- 3

Question 5 of 20

Question 6 of 20

6. Which set of quantities is all scalar?

acceleration, displacement, velocity

energy, mass, power

extension, force, gravitational potential energy

weight, kinetic energy, work

Question 6 of 20

Question 7 of 20

7. A student takes measurements for a piece of copper wire. Mass 0.00500 kg; Length 3.36m; Diameter 0.00046m; The student uses these values to calculate a value for the density of the copper. The correctly calculated value of density is shown on the students calculator as 8954.166841 The student should state the density as....

8954.166841 kg m-3

8950 kg m-3

8.95 x 103 kg m-3

9.0 x 103 kg m-3

Question 7 of 20

Question 8 of 20

8. In which of the following is a vector fully described?

A car travels north

A crane moves a load 20 m east

A train travels at a rate of 35 ms-1

A lift moves upwards with a kinetic energy of 2.5 kJ

Question 8 of 20

Question 9 of 20

9. Which of the following is a correct statement?

Weight is a base quantity.

Velocity is a base quantity.

Mass is a derived quantity.

Force is a derived quantity

Question 9 of 20

Question 10 of 20

10. The main component of a newton meter is a calibrated spring. The newton meter is to be used over a greater range of forces. Which of the following should be increased to allow this?

ductility of the spring wire

precision of the scale

stiffness of the spring

ultimate tensile strength of the spring

Question 10 of 20

Question 11 of 20

11. Which statement about scalar and vector quantities is correct?

Scalars have direction only.

Scalars have distance only.

Vectors have magnitude and direction.

Vectors have magnitude and distance.

Question 11 of 20

Question 12 of 20

12. Which of the following is a unit equivalent to the pascal?

kg ms- 1

kg ms-2

kg ms- 3

kg m-1 s-2

Question 12 of 20

Question 13 of 20

13. Which of the following is not a unit of energy?

Ns-1

kWh

Question 13 of 20

Question 14 of 20

14. Which of the following is a vector quantity?

distance

force

speed

work

Question 14 of 20

Question 15 of 20

15. Which of the following is a scalar quantity?

displacement

force

time

velocity

Question 15 of 20

Question 16 of 20

16. Which of the following is not a SI base quantity?

force

length

mass

time

Question 16 of 20

Question 17 of 20

17. Which of these units is the same as the Newton?

kg ms-1

kg ms-2

kg m2 s-2

kg m2 s-3

Question 17 of 20

Question 18 of 20

18. Which of the following is a derived SI quantity?

force

length

second

watt

Question 18 of 20

Question 19 of 20

19. Which of the following is a possible unit for rate of change of momentum?

kg ms-2

kg ms-1

Ns-1

Question 19 of 20

Question 20 of 20

20. A correct unit for radiant energy flux is:

N m-1s-1

Nm-1

Wm2

Question 20 of 20

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