imp formula of work power and energy
Question
imp formula of work power and energy
Solution
Sure, here are some important formulas related to work, power, and energy:
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Work (W): Work is defined as the product of the force (F) applied on an object and the distance (d) the object moves in the direction of the force. The formula is: W = F * d * cos(θ) where θ is the angle between the force and the direction of motion.
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Energy (E): Energy is the capacity to do work. There are various forms of energy, such as kinetic energy and potential energy. The formulas are:
- Kinetic Energy (KE): KE = 1/2 * m * v^2 where m is the mass of the object and v is its velocity.
- Potential Energy (PE): PE = m * g * h where m is the mass of the object, g is the acceleration due to gravity, and h is the height above the ground.
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Power (P): Power is the rate at which work is done or energy is transferred. The formula is: P = W/t where W is the work done and t is the time taken to do the work. Power can also be calculated as the product of force and velocity, i.e., P = F * v.
Remember, the units of work and energy are the same (Joules), and the unit of power is Watts.
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Power = 400 WTime = 2.5 minutesCalculate the work done.Work done = _____ kJ
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