Equations

Question 1

What is the formula for kinetic energy?

Answer 1

kinetic energy = 0.5 x mass x speed^2

Kinetic energy is the energy an object has due to its motion.

Question 2

How do you calculate gravitational potential energy (GPE)?

Answer 2

GPE = mass × gravitational field strength × height

GPE is the energy stored in an object due to its position in a gravitational field.

Question 3

What is the formula for power?

Answer 3

power = work done / time taken

Power measures the rate at which work is done or energy is transferred.

Question 4

Fill in the blank: Efficiency = ______.

Answer 4

useful energy output / total energy input

Question 5

What is the equation for elastic potential energy?

Answer 5

elastic potential energy = 0.5 x spring constant x (extension)^2

This equation describes the potential energy stored in a spring when it is compressed or stretched.

Question 6

What is the formula for charge flow?

Answer 6

charge flow = current x time

This equation relates the amount of electric charge that flows through a circuit over a period of time.

Question 7

What is the formula for potential difference?

Answer 7

potential difference = current x resistance

This equation is derived from Ohm’s Law.

Question 8

How do you calculate total resistance in a series circuit?

Answer 8

total resistance = resistance of component 1 + resistance of component 2

In series circuits, resistances add up.

Question 9

What is the equation for energy transferred?

Answer 9

energy transferred = power x time

This formula shows how energy can be calculated based on power and time.

Question 10

Fill in the blank: Density = mass / ______.

Answer 10

volume

Question 11

What is the formula for wave speed?

Answer 11

wave speed = frequency × wavelength

This equation describes how waves travel through a medium.

Question 12

What is the formula for pressure?

Answer 12

pressure = force / area

Pressure is defined as the force applied per unit area.

Question 13

How do you calculate weight?

Answer 13

weight = mass x gravitational field strength

Weight is the force exerted by gravity on an object.

Question 14

What is the formula for momentum?

Answer 14

momentum = mass x velocity

Momentum is a measure of the motion of an object and is conserved in isolated systems.

Question 15

Fill in the blank: The formula for work done is ______.

Answer 15

work done = force x distance

Question 16

What is the formula for acceleration?

Answer 16

acceleration = change in velocity / time taken

This formula calculates how quickly an object changes its velocity.

Question 17

What is the equation relating pressure, height, density, and gravitational strength?

Answer 17

Pressure = height of column x density of liquid x gravitational field strength

This equation is applicable in fluid statics.

Question 18

What is the relationship between frequency and time period?

Answer 18

time period = 1 / frequency

The time period is the duration of one cycle in a repeating event.

Question 19

What does the equation pV = constant signify?

Answer 19

It signifies that for a fixed amount of gas at a constant temperature, the product of pressure and volume remains constant

This is known as Boyle’s Law.