Equations

Question 1

What is the equation for speed?

Answer 1

Speed = distance/time

Question 2

What is the equation for acceleration?

Answer 2

Acceleration (m/s2) = change in velocity/time taken

a = v-u/t

Question 3

What is the equation for weight?

Answer 3

Weight (N) = mass (kg) x gravitational field strength

W = m x g

Question 4

What is the equation for resultant force/acceleration?

Answer 4

Resultant force = mass x acceleration
F = ma
OR
Acceleration = resultant force/mass
a = f/m

Question 5

What is the equation for momentum?

Answer 5

Momentum (kgm/s) = mass (kg) x velocity (m/s)

P = m x v

Question 6

What is the equation for force acting?

Answer 6

Force acting (N) = change in momentum (kgm/s)/time taken for change to happen (s)

Question 7

What is the equation for moment?

Answer 7

Moment = force x perpendicular DISTANCE from the line of action of the force to the pivot

Question 8

What is the equation for clockwise and anti-clockwise moments?

Answer 8

Total anti-clockwise moments = total clockwise moments

Question 9

What is the equation for electrical power?

Answer 9

Electrical power = current x voltage

P = I x v