Physic Important Equations

Question 1

Distance Traveled

Answer 1

Average speed x Time

Question 2

Acceleration

Answer 2

Change in Velocity ÷ Time Taken

Question 3

Force

Answer 3

Mass x Acceleration

Question 4

Weight

Answer 4

Mass x Gravitational Field Strength

Question 5

Efficiency

Answer 5

Useful Energy Transferred by the device ÷ Total Energy Supplied To The Device

Question 6

Momentum

Answer 6

Mass x Velocity

Question 7

Wave speed

Answer 7

Distance ÷ Time

Question 8

Density

Answer 8

Mass ÷ Volume

Question 9

Work done

Answer 9

Force x Distance moved in direction of force

Question 10

Change in gravational potential energy

Answer 10

Mass x Gravitational field strength x Change in Vertical Height

Question 11

Kinetic energy

Answer 11

1 over 2 x Mass x (speed)²

Question 12

Power

Answer 12

Work done ÷ Time Taken

Question 13

Energy Transferred

Answer 13

Charge Moved x Potential Difference

Question 14

Charge

Answer 14

Current x Time

Question 15

Potential difference

Answer 15

Current x Resistance

Question 16

Power

Answer 16

Energy Transferred ÷ Time Taken

Question 17

Electrical power

Answer 17

Current x Potential Difference

Question 18

Electrical power

Answer 18

Current Squared x Resistance

Question 19

Force exerted on a spring

Answer 19

Spring constant x Extension

Question 20

Moment of a force

Answer 20

Force x Distance Normal to the direction of the force

Question 21

Pressure

Answer 21

Force Normal to surface ÷ Area of that surface