1.1 Physical quantities and measurement techniques

A student determines the circumference of a golf ball.

Which instrument gives a reading that is the circumference of the golf ball?

A) calipers
B) micrometer
C) rule
D) tape

Which quantity is a vector?

A) energy
B) force
C) speed
D) time

Newton’s third law involves two quantities which are equal in size and opposite in direction.

What is the unit for these two quantities?

A) J
B) m / s2
C) N
D) W

During an experiment to find the volume of a stone, the stone is lowered into a measuring cylinder partly filled with water.

Which statement is correct?

A) The difference between the readings gives the mass of the stone.
B) The difference between the readings gives the volume of the stone.
C) The final reading gives the mass of the stone.
D) The final reading gives the volume of the stone.

The diagram shows a micrometer scale.

Which reading is shown?

A) 5.64 mm
B) 7.14 mm
C) 7.16 mm
D) 7.64 mm

The diagram shows arrows representing two vector quantities.

Which diagram shows the resultant R of these two vectors?

A
B
C
D

The diagram shows a stopwatch

What is the reading on the stopwatch?

A) 30.6 s
B) 33.0 s
C) 36.0 s
D) 36.6 s

Velocity is given by the change in displacement divided by the change in time.

How many vector quantities appear in this statement?

A) 0
B) 1
C) 2
D) 3

A quantity is quoted as having a value of 6.2 ms.

In what units is it measured?

A) milliseconds
B) metres per second
C) microseconds
D) metres

One oscillation of a swinging pendulum occurs when the bob moves from X to Y and back to X again.

Using a stopwatch, which would be the most accurate way to measure the time for one oscillation of the pendulum?

A) Time 20 oscillations and multiply by 20.
B) Time 20 oscillations and divide by 20.
C) Time one oscillation.
D) Time the motion from X to Y, and double it.