Equations

Question 1

What is the word/symbol equation and units for Average speed

Answer 1

Average speed=total distance/total time
S = d / t

S = average speed (m / s)
d = distance (m)
t = time (s)

Question 2

What is the word/symbol equation and units for Average velocity

Answer 2

Average velocity= total displacement/total time
Average velocity = (u + v) / 2

average velocity (m/s)
u = initial velocity (m / s)
v = final velocity (m/s)

Question 3

What is the word/symbol equation and units for Acceleration

Answer 3

Acceleration= change in velocity/time
a = (v - u)/t

a = acceleration (m/s²)
u = initial velocity (m / s)
v = final velocity (m / s)
t = time (s)

Question 4

What is the word/symbol equation and units for Displacement

Answer 4

Displacement=average velocity x time
s = (u + v)/2 * t

s = displacement (m)
u = initial velocity (m / s)
v = final velocity (m / s)
t = time (s)

Question 5

What is the word/symbol equation and units for Resultant force

Answer 5

Resultant force =mass x acceleration
Fr= ma

Fr = resultant force (N)
m = mass (kg)
a = acceleration (m/s²)

Question 6

What is the word/symbol equation and units for Weight

Answer 6

Weight=mass x gravity
W = mg

W=weight (N)
m=mass (kg)
g=gravity (N / kg)

Question 7

What is the word/symbol equation and units for Hooke’s law

Answer 7

Hooke’s law
F = ke

F = applied force (N)
k = spring constant (N / m)
e = extension (m)

Question 8

What is the word/symbol equation and units for Pressure

Answer 8

Pressure= Force/Area
P = F / A

P = pressure (Pa)
F = force (N)
A=area (m²)

Question 9

What is the word/symbol equation and units for Moment

Answer 9

Moment = Force x perpendicular distance from the pivot
M = Fd
(ACWM= CWM )
(F1D1 = F2D2)

M = Moment (Nm or Ncm)
F = Force (N)
d = perpendicular distance from pivot (m or cm)

Question 10

What is the word/symbol equation and units for Density

Answer 10

Density= mass/volume
D = MV

D = density ( g/cm³ or kg/m³)
M = (g or kg)
V = volume ( cm³ or m³ )

Question 11

What is the word/symbol equation and units for Efficiency

Answer 11

Efficiency = useful energy output/total input energy
e = UEO/TIE

Question 12

What is the word/symbol equation and units for Work done

Answer 12

Work done = force x distance
w = fd

W = work done (J)
F = force (N)
D = distance moved (m)

Question 13

What is the word/symbol equation and units for Power

Answer 13

Power = energy transferred/time taken = work done/time taken
P= E/T and P = W/T

P = power (watts or J/s)
E = energy transferred (J)
W = work done (J)
T = time taken (s)

Question 14

What is the word/symbol equation and units for Kinetic energy

Answer 14

Kinetic Energy = 1/2 x mass x velocity²
Ek = 1/2mv²

Ek = kinetic energy (J)
M = mass (kg)
V = velocity (m/s)

Question 15

What is the word/symbol equation and units for Potential energy

Answer 15

Potential energy = mass x acceleration due to gravity x hight
Ep =mgh

Ep = potential energy (J)
M = mass (kg)
H = hight (m)
G = acceleration due to gravity (m/s²)