Formulae

Question 1

What is the acceleration due to gravity?

Answer 1

9.8 m/s²

This value is commonly used in physics calculations involving falling objects.

Question 2

What is the formula for calculating speed?

Answer 2

speed = distance / time

This formula calculates the average speed of an object over a specified distance and time.

Question 3

How do you calculate acceleration?

Answer 3

acceleration = (final speed - initial speed) / time

This formula determines how quickly an object’s speed changes over time.

Question 4

What does F = ma represent?

Answer 4

Force equals mass times acceleration

This is Newton’s second law of motion, relating force, mass, and acceleration.

Question 5

What is the formula for kinetic energy (K.E.)?

Answer 5

K.E. = 1/2 mv²

This formula calculates the energy an object has due to its motion.

Question 6

What is the formula for gravitational potential energy (G.P.E.)?

Answer 6

G.P.E. = mgh

This formula calculates the potential energy of an object based on its height above a reference point.

Question 7

How is percentage efficiency calculated?

Answer 7

percentage efficiency = (useful energy out / total energy in) × 100

This formula measures how effectively energy is converted from one form to another.

Question 8

What is the relationship between wave speed (v), wavelength (λ), and frequency (f)?

Answer 8

v = f × λ

This equation describes how the speed of a wave is determined by its wavelength and frequency.

Question 9

What is the formula for the period (T) of a wave?

Answer 9

T = 1/f

The period is the time it takes for one complete cycle of the wave.