Secondary 3 Science (Physics) Revision

A pendulum swings backwards and forwards passing through Y, the middle point of the oscillation. The time taken for the pendulum to swing from Y to Z as shown in the diagram is 0.50 s.

What is the period of the pendulum?

• 0.50 s

• 1.0 s

• 1.5 s

• 2.0 s

Which is a vector quantity?

• distance
• force
• power
• pressure

A voltage of 8 MV is applied across a resistor. Which option gives the voltage in volts?

• 8 000 000 V
• 80 000 000 V
• 800 000 000 V
• 8 000 000 000 V

A current of 3 mA is measured. Which option gives the current in amperes?

• 0.000 003 A
• 0.000 03A
• 0.0003A
• 0.003 A

What is the order of magnitude of the diameter of a typical atom?

• 1 × 10^-7 m

• 1 × 10^-8 m

• 1 × 10^-9 m

• 1 × 10^-10 m

Which statement about temperature is correct?

• Temperature is a scalar, its SI unit is degree celcius.
• Temperature is a scalar, its SI unit is Kelvin.
• Temperature is a vector, its SI unit is degree celcius.
• Temperature is a vector, its SI unit is Kelvin.

The diagram shows a pair of vernier callipers measuring the diameter of a marble.

What is the diameter of the marble?

• 5.03 cm

• 5.51 cm

• 5.53 cm

• 5.83cm

Which graph shows a ball experiencing free fall in vacuum?

• A

• B

• C

• D

The graph shows the speed of a car.

What is the acceleration of the car during the first 5 seconds?

• 1.8 m/s²

• 5.0 m/s²

• 18 m/s²

• 90 m/s²

What is the best description of non-uniform acceleration?

• acceleration of free-fall for a body near the Earth
• constant rate of change of velocity
• increasing rate of change of velocity
• zero rate of change of velocity