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प्रश्न
Is energy a vector quantity?
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उत्तर
No, energy is a scalar quantity as it has only magnitude.
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संबंधित प्रश्न
A stone of mass 500 g is thrown vertically upwards with a velocity of 15 m/s. Calculate:
- the potential energy at the greatest height,
- the kinetic energy on reaching the ground, and
- the total energy at its half-way point.
State whether the object possess kinetic energy, potential energy, or both :
A man climbing a hill _____________.
An iron sphere of mass 10 kg has the same diameter as an aluminium sphere of mass 3.5 kg. Both the spheres are dropped simultaneously from a tower. When they are 10 m above the ground, they have the same :
A stone is thrown upwards as shown in the diagram. When it reaches P, which of the following has the greatest value of the stone?
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Chemical energy into kinetic energy (or mechanical energy).
Fill in the blanks with suitable words:
When a ball is thrown upwards, ___________ energy is transformed into ___________ energy.
What kind of energy transformations take place at a coal-based thermal power station?
A ball falls to the ground as shown below :
What is the potential energy of ball at B?
The device which converts mechanical energy into energy which runs our microwave oven is :
A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. The work done against the gravitational force will be (g = 10 m s–2)
