Physics Equations

Question 1

What is the equation to calculate weight

Answer 1

Weight=mass x gravitational field strength (g)

Question 2

How do you calculate Work Done

Answer 2

Work done= force x distance (along the line of action of the force

Question 3

How to calculate force applied to a spring

Answer 3

Spring Constant x extension

Question 4

Moment of a force

Answer 4

Force x distance (normal direction of force

Question 5

Pressure

Answer 5

Force normal to a surface / area of that surface

Question 6

Distance travelled

Answer 6

Speed x time

Question 7

Acceleration

Answer 7

Change in velocity / time taken

Question 8

Resultant force

Answer 8

Mass x acceleration

Question 9

Momentum

Answer 9

Mass x velocity

Question 10

Kinetic energy

Answer 10

O.5 x mass x (speed x speed)

Question 11

Gravitational potential energy

Answer 11

Mass x gravitational field strength (g) x height

Question 12

Power

Answer 12

Energy transferred / time

Question 13

What links power, work done, time

Answer 13

Power= work done/ time

Question 14

Efficiency

Answer 14

Useful power output / total power input

Question 15

Wave speed

Answer 15

Frequency x wavelength

Question 16

Charge

Answer 16

Current x time

Question 17

Potential difference

Answer 17

Current x resistance

Question 18

What links power, potential difference , current

Answer 18

Power= potential difference x current

Question 19

What links power, current, resistance

Answer 19

Power= (current x current) x resistance

Question 20

What links energy transferred, power, time

Answer 20

Energy transferred = power x time

Question 21

What links energy transferred, charge flow, potential difference

Answer 21

Energy transferred= charge flow x potential difference

Question 22

Density

Answer 22

Mass / volume