Formulars

Question 1

How to find Elastic Energy?

Answer 1

1/2 x spring constant (N/m) x extension² (m²)

Question 2

How do you find Kinetic Energy?

Answer 2

1/2 x mass (kg) x velocity² (m/s²)

Question 3

How to find Potential Energy?

Answer 3

Mass (kg) x gravity (N/kg) x height (m)

Question 4

How to find change in Thermal Energy?

Answer 4

Mass (kg) x specific heat capacity (J/kgC) x change in temperature (C)

Question 5

How to find Power (W)?

Answer 5

Energy Transfer (J) / Time (s)

Question 6

How to find Power (W)? —

Answer 6

Work done (J) / Time taken (s)
Energy transfer (J) / time taken (s)

Question 7

How to find Efficiency?

Answer 7

Useful energy output / total energy input (J)
Useful power output / total power input (W)

Question 8

How to find Weight (N)?

Answer 8

Mass (kg) x gravitational field strength (N/kg)

Question 9

How to find Work done (J)?

Answer 9

Force (N) x Distance (cm) — moved along the line of action of force

Question 10

How do you find force (N)?

Answer 10

Spring constant (N/m) x extension (m²)

Question 11

How to Find Movement of Force?

Answer 11

Force (N) x Distance (m)

Question 12

How to find Pressure (Pa)?

Answer 12

Force normal to surface (N) / Area of that surface (m²)

Question 13

How to find Distance traveled (m)?

Answer 13

Speed (m/s, km/h, mph) x time (s)

Question 14

How to find Acceleration (m/s²)?

Answer 14

Change in velocity (m/s) / time taken (s)
Final velocity (m/s) - initial velocity (m/s) / time taken (s)

Question 15

How to find resultant force (N)?

Answer 15

Mass (kg) x acceleration (m/s²)

Question 16

How to find Momentum (kg x m/s)?

Answer 16

Mass (kg) x velocity (m/s)

Question 17

How to find Pressure (Pa = N/m²)?

Answer 17

Height of column (m) x density of liquid (g/ml) x gravitational field strength (N/kg)