Quiz Chapter 1: Physical Quantities and Measurements

1. A graph of y against x is a straight line that intersects the positive y-axis and has a positive slope. What is the relationship between y and x?

1. y is directly proportional to x
2. y increases linearly with x
3. y is inversely proportional to x
4. y decreases linearly with x

2. Which set contains ONLY scalar quantities?

1. Displacement, speed, mass
2. Velocity, acceleration, force
3. Time, mass, energy, temperature
4. Weight, density, area, speed

3. What is the SI base unit for mass?

1. Gram (g)
2. Tonne (t)
3. Kilogram (kg)
4. Milligram (mg)

4. What quantity is represented by the gradient of a velocity-time graph?

1. Acceleration
2. Displacement
3. Momentum
4. Force

5. In an experiment investigating how spring extension varies with applied mass, what is the responding variable?

1. Mass of the load
2. Spring extension
3. Initial length of spring
4. Material of the wire

6. Convert a speed of 72 km h⁻¹ into SI base units (m s⁻¹).

1. 20 m s⁻¹
2. 200 m s⁻¹
3. 25 m s⁻¹
4. 15 m s⁻¹

7. A vector quantity is defined as a physical quantity that has:

1. Magnitude only
2. Direction only
3. Neither magnitude nor direction
4. Both magnitude and direction

8. The power output of an engine is 2.5 kW. What is this value expressed in Watts (W)?

1. 250 W
2. 2500 W
3. 25000 W
4. 0.0025 W

9. Which of the following is NOT one of the 7 base quantities in the SI system?

1. Amount of substance
2. Electric current
3. Electric charge
4. Length

10. Which of the following is an SI base quantity?

1. Force
2. Thermodynamic temperature
3. Velocity
4. Volume