forces and motion

Question 1

What is the SI unit of mass?

Answer 1

Kilogram (kg)

Question 2

True or False: The speed of light is approximately 300,000 kilometers per second.

Answer 2

True

Question 3

Fill in the blank: The formula for calculating force is ____ = mass × acceleration.

Answer 3

force

Question 4

What is the formula for calculating work done?

Answer 4

Work = Force × Distance

Question 5

Multiple Choice: Which of the following is a vector quantity? A) Speed B) Mass C) Velocity D) Temperature

Answer 5

C) Velocity

Question 6

Define the term ‘energy’.

Answer 6

The capacity to do work.

Question 7

What is the law of conservation of energy?

Answer 7

Energy cannot be created or destroyed, only transformed.

Question 8

True or False: Kinetic energy depends on the mass and the square of the velocity.

Answer 8

True

Question 9

What is the formula for gravitational potential energy?

Answer 9

Potential Energy = mass × gravitational field strength × height

Question 10

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

Answer 10

Watt (W)

Question 11

Multiple Choice: Which type of energy is stored in a compressed spring? A) Kinetic B) Potential C) Thermal D) Chemical

Answer 11

B) Potential

Question 12

What is the definition of pressure?

Answer 12

Force per unit area.

Question 13

True or False: Atmospheric pressure decreases with increasing altitude.

Answer 13

True

Question 14

What is the formula for calculating density?

Answer 14

Density = mass / volume

Question 15

Fill in the blank: The process of a substance changing from a solid to a liquid is called _____.

Answer 15

melting

Question 16

Multiple Choice: Which of the following is an example of a non-contact force? A) Friction B) Tension C) Gravity D) Normal

Answer 16

C) Gravity

Question 17

What is Newton’s first law of motion?

Answer 17

An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.

Question 18

True or False: The total momentum of a closed system is conserved.

Answer 18

True

Question 19

What is the principle of moments?

Answer 19

For an object in equilibrium, the sum of clockwise moments about a pivot equals the sum of anti-clockwise moments.

Question 20

Fill in the blank: The frequency of a wave is measured in _____ (unit).

Answer 20

Hertz (Hz)

Question 21

Multiple Choice: Which type of wave requires a medium to travel? A) Electromagnetic B) Sound C) Light D) Radio

Answer 21

B) Sound

Question 22

What is the formula for calculating wave speed?

Answer 22

Wave speed = frequency × wavelength

Question 23

True or False: The amplitude of a wave is related to its energy.

Answer 23

True

Question 24

What is refraction?

Answer 24

The bending of light as it passes from one medium to another.

Question 25

Fill in the blank: The pH scale measures the _____ of a solution.

Answer 25

acidity or alkalinity

Question 26

What is the formula for calculating the efficiency of a machine?

Answer 26

Efficiency = (Useful energy output / Total energy input) × 100%