Quiz Chapter 1: Physical Quantities and Measurements

1. 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

2. Which base unit combination is equivalent to 1 Joule (J) of energy?

1. kg m s⁻²
2. kg m² s⁻²
3. kg m⁻¹ s⁻²
4. kg m² s⁻³

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

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

4. If momentum = mass × velocity, what are the SI base units for momentum?

1. kg m s⁻¹
2. kg m s⁻²
3. kg m² s⁻¹
4. kg m⁻¹ s⁻¹

5. Which of the following derived quantities is correctly matched with its SI base units?

1. Pressure: kg m⁻¹ s⁻²
2. Force: kg m s⁻¹
3. Density: kg m⁻²
4. Work: kg m s⁻²

6. 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

7. Which of the following physical quantities is a derived vector quantity?

1. Speed
2. Temperature
3. Electric current
4. Momentum

8. In a physics experiment, keeping room temperature constant throughout all trials ensures that temperature acts as a:

1. Manipulated variable
2. Responding variable
3. Constant variable
4. Random variable

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 graph shape signifies that variable y decreases linearly with variable x?

1. Straight line passing through the origin
2. Hyperbolic curve non-intersecting axes
3. Straight line with negative gradient and positive y-intercept
4. Horizontal straight line parallel to x-axis