O-Level Combined Science — Physics

Question 1

What is the SI unit of force?

Accepted Answer

Newton

Answer

Watt

Answer

Joule

Answer

Pascal

Question 2

A 5 kg object accelerates at 3 m/s². What is the net force acting on it?

Accepted Answer

15 N

Answer

8 N

Answer

2 N

Answer

1.67 N

Question 3

Which type of wave requires a medium to travel?

Accepted Answer

Sound waves

Answer

Light waves

Answer

Radio waves

Answer

Gamma rays

Question 4

What is the formula for density?

Accepted Answer

Density = Mass/Volume

Answer

Density = Volume/Mass

Answer

Density = Mass × Volume

Answer

Density = Weight/Volume

Question 5

Which phenomenon explains why a straw appears bent when placed in a glass of water?

Accepted Answer

Refraction

Answer

Reflection

Answer

Diffraction

Answer

Dispersion

Question 6

What type of energy does a moving car possess?

Accepted Answer

Kinetic energy

Answer

Potential energy

Answer

Thermal energy

Answer

Chemical energy