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प्रश्न
What are the uses of mechanical energy?
उत्तर
- In hydroelectric plants, the kinetic energy of water is converted into electrical energy.
- Windmills convert the kinetic energy of winds into electrical energy.
- The mechanical energy of the hammer is used to apply a force to a nail.
- Mechanical energy can bring a moving body to rest and make a body at rest move.
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संबंधित प्रश्न
An object of mass, m is moving with a constant velocity, v. How much work should be done on the object in order to bring the object to rest?
Name the unit of physical quantity obtained by the formula `(2K)/V^2` Where k: kinetic energy, V: Linear velocity
The energy of a flying kite is kinetic energy.
A body falls freely under gravity from rest. Name the kind of energy it will possess on reaching the ground.
Write an expression for the kinetic energy of a body of mass m moving with a velocity v.
If an object has 0 momentum, does it have kinetic energy? Explain your answer.
An apple falling from a tree is an example for kinetic energy.
A body starts from rest and is acted on by a constant force. The ratio of kinetic energy gained by it in the first five seconds to that gained in the next five-second is:
A car of mass 120 kg is moving at a speed 18 km/h and it accelerates to attain a speed of 54 km/h in 5 seconds. Calculate:
- the work done by the engine.
- the power of the engine.
Find the kinetic energy of a body of mass 5 kg moving with a uniform velocity of 10 m s-1.
