Q1
What is the formula for work done?
AW = F×s
BW = F+s
CW = F÷s
DW = F-s
ICSEClass 10 (ICSE)PhysicsCh 2 · Topic 1
Work, Energy and Power
Work, energy, and power are related concepts in physics, describing how forces cause motion, the capacity to do work, and the rate of doing
Core concept
Work done is calculated as force multiplied by displacement in the direction of force: W = F×s, measured in joules.
How it works
Energy is the capacity to do work, existing in forms like kinetic energy (½mv²) and potential energy (mgh).
Why it matters
The principle of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.
Key detail
Power is the rate of doing work, calculated as P = W/t, measured in watts, showing how quickly work is performed.
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Quick notes
• Work = force × displacement (W=F×s).
• Measured in joules.
• Energy is the capacity to do work.
• Kinetic energy = ½mv²; Potential energy = mgh.
• Energy conservation: cannot be created/destroyed.
• It only transforms between forms.
• Power = work ÷ time (P=W/t).
• Power is measured in watts.