Physics

Question 1

What is the formula for calculating force?

Answer 1

Force = Mass x Acceleration

Question 2

True or False: Energy can be created or destroyed.

Answer 2

False

Question 3

Fill in the blank: The unit of power is ___ .

Answer 3

Watt

Question 4

What is the principle of conservation of energy?

Answer 4

Energy cannot be created or destroyed, only transformed.

Question 5

What is the acceleration due to gravity on Earth?

Answer 5

9.81 m/s²

Question 6

Which of the following is a vector quantity? (a) Mass (b) Speed (c) Velocity

Answer 6

c) Velocity

Question 7

What is the definition of work in physics?

Answer 7

Work is done when a force causes displacement.

Question 8

True or False: An object in motion will remain in motion unless acted upon by an external force.

Answer 8

True

Question 9

What is the formula for kinetic energy?

Answer 9

Kinetic Energy = 0.5 x Mass x Velocity²

Question 10

Fill in the blank: The law of universal gravitation states that every point mass attracts every other point mass with a force proportional to the product of their ___ .

Answer 10

masses

Question 11

What is the unit of measurement for electric current?

Answer 11

Ampere

Question 12

What does the symbol ‘c’ represent in physics?

Answer 12

The speed of light in a vacuum.

Question 13

True or False: In a vacuum, all objects fall at the same rate regardless of their mass.

Answer 13

True

Question 14

What is the formula for potential energy?

Answer 14

Potential Energy = Mass x Gravity x Height

Question 15

What is the difference between speed and velocity?

Answer 15

Speed is scalar; velocity is vector and includes direction.

Question 16

Fill in the blank: The ___ is the measure of the average kinetic energy of the particles in a substance.

Answer 16

temperature

Question 17

Which law states that for every action there is an equal and opposite reaction?

Answer 17

Newton’s Third Law of Motion

Question 18

What is the SI unit of force?

Answer 18

Newton

Question 19

True or False: The total momentum of a closed system remains constant.

Answer 19

True

Question 20

What is the formula for calculating pressure?

Answer 20

Pressure = Force / Area

Question 21

Fill in the blank: The ___ of an object is the amount of matter it contains.

Answer 21

mass

Question 22

What is the principle of moments?

Answer 22

For an object to be in equilibrium, the sum of clockwise moments about a pivot must equal the sum of anti-clockwise moments.

Question 23

What is the relationship between frequency and wavelength in a wave?

Answer 23

Frequency = Speed / Wavelength

Question 24

True or False: A wave can transfer energy without transferring matter.

Answer 24

True

Question 25

What is the law of reflection?

Answer 25

The angle of incidence is equal to the angle of reflection.

Question 26

What does Ohm's Law state?

Answer 26

Voltage = Current x Resistance

Question 27

Fill in the blank: The ___ is the distance traveled by a wave in one complete cycle.

Answer 27

wavelength