General Equations

Question 1

Average speed = ?

Answer 1

Distance(m)
—————-
Time(s)

Question 2

Average velocity = ?

Answer 2

Displacement(m)
————————
Time(s)

Question 3

Period of a pendulum = ?

Answer 3

Total time (s)
————————-
Number of swings

Question 4

Acceleration

Answer 4

Final velocity(m/s) - initial velocity(m/s)
——————————————————
Time(s)

Question 5

Weight (N) = ?

Answer 5

Mass(Kg)*Gravitational Field Strength(m/s(squared))
Note: GFS= 10(m/s(squared))

Question 6

Force = ?

Answer 6

Mass(Kg)*Acceleration(m/s(squared))

Question 7

Density = ?

Answer 7

Mass(Kg)
—————————
Volume(m(cubed))

Question 8

What does Hookes law measure for

Answer 8

Force(N)

Question 9

Hookes Law:
Force(N) = ?

Answer 9

Constant(Nm)*extension(M)

Question 10

Pressure(Pa) = ?

Answer 10

Force(N)
————————
Area(m(squared))

Question 11

Fluid Pressure(Pa) = ?

Answer 11

Density(kg/m(cubed))gravitational field strength(m/s(squared))height(m)

Question 12

Work(J) = ?

Answer 12

Force(N)*distance moved(m)

Question 13

Power(W) = ?

Answer 13

Work(J)
————-
Time(s)

Question 14

Kinetic Energy(J) = ?

Answer 14

1/2mass(Kg)velocity^2(m/s^2)

Question 15

Gravitational Potential Energy(J) = ?

Answer 15

Mass(Kg)gravitational field strength(m/s^2) or (N/kg)height(m)

Question 16

Efficiency(Power) = ?

Answer 16

Useful power output(W)
——————————— x 100
Total power input(W)

Question 17

Efficiency(energy) = ?

Answer 17

Useful Energy Output(J)
——————————— x 100
Total energy input(J)

Question 18

Moment(Nm) = ?

Answer 18

Force(N)*perpendicular distance from pivot(m)

Question 19

Sum of clockwise moments(Nm) =

Answer 19

Sum of anticlockwise moments(Nm)

Question 20

Momentum(Kgm/s) = ?

Answer 20

Mass(Kg)*velocity(m/s)

Question 21

Force(N) = ?

Answer 21

Change in momentum(kgm/s)
——————————————
Time(s)

Question 22

Impulse(kgm/s or N/s) = ?

Answer 22

Change in momentum(Kgm/s)

Question 23

Centripetal force(N) = ?

Answer 23

Mass(Kg)*velocity^2(m/s)
————————————
Radius(m)

Question 24

Orbital period(s)

Answer 24

2piradius(m)
———————
Velocity(m/s)