AFOQT Physical Science Principles 2

Question 1

A 10 kg object accelerates at 3 m/s². What net force acts on it?

Accepted Answer

30 N

Answer

3 N

Answer

13 N

Answer

0.3 N

Question 2

Which form of energy is stored in a stretched spring?

Accepted Answer

Elastic potential energy

Answer

Kinetic energy

Answer

Thermal energy

Answer

Nuclear energy

Question 3

What happens to the wavelength of a wave if its frequency increases while speed stays constant?

Accepted Answer

Wavelength decreases

Answer

Wavelength increases

Answer

Wavelength stays the same

Answer

Wavelength becomes zero

Question 4

Which of these is a chemical change rather than a physical change?

Accepted Answer

Rusting iron

Answer

Melting ice

Answer

Boiling water

Answer

Crushing a can

Question 5

What is the SI unit of electric current?

Accepted Answer

Ampere

Answer

Volt

Answer

Watt

Answer

Ohm

Question 6

An object at rest stays at rest unless acted on by a force. This describes which law?

Accepted Answer

Newton's first law

Answer

Newton's second law

Answer

Newton's third law

Answer

Law of gravitation

Question 7

Which subatomic particle carries a negative charge?

Accepted Answer

Electron

Answer

Proton

Answer

Neutron

Answer

Nucleus