Topic 1- Key Concepts Of Phsyics -Equations & Units

Question 1

What is the acceleration equation

Answer 1

a = v - u
——
t

a - acceleration m/s2 Motion equation
v - final velocity
u - initial velocity
t - time

Question 2

What is the force equation

Answer 2

F = m x a

F - force in newtons (N)
m - mass in kg
a - acceleration m/s. Force equation

Question 3

What is the mass , weight and gravity equation called

Answer 3

W = m x g

W - weight in (N)
m - mass in (kg)
g - gravitational field strength in (N/kg)

Question 4

What is the gravitational potential energy equation

Answer 4

🔼GPE = m x g x h

🔼 - jules ( J )
m - mass in (kg)
g - gravitational field strength in (N/kg)
h - distance in ( m )

Question 5

What is the kinetic energy equation

Answer 5

KE = 0.5 x m x v2

KE - measured in Jules ( J )
m - mass in (kg)
v2 - velocity in (m/s)

Question 6

What is the momentum equation

Answer 6

P = m x v

p - momentum in kg (m/s)
m - mass in (kg)
v - velocity in (m/s)

Question 7

What is the wave velocity equation

Answer 7

V = f x λ

V - wave velocity in (m/s)
f - frequency in ( Hz )
λ - wave length in ( m )

Question 8

What is the equation for wave speed equation

Answer 8

V = x
—-
t

V - wave velocity in m/s
x - distance in ( m )
t - time in seconds

Question 9

What is the distance traveled equation

Answer 9

Distance traveled = average speed x time

Distance traveled - meters ( m )
Average speed - (m/s)
Time - seconds - ( s )

Question 10

What is the efficiency equation

Answer 10

Efficiency = useful energy out
__________________
Total energy in

Measured in Jules ( j )

Question 11

What is the speed equation

Answer 11

S = d
—-
T

Question 12

Give the average speed equation

Answer 12

Average speed = distance
————
Time