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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
Show that the sum of kinetic energy and potential energy (i.e., total mechanical energy) is always conserved in the case of a freely falling body under gravity (with air resistance neglected) from a height h by finding it when
- The body is at the top.
- the body has fallen a distance x.
- the body has reached the ground.
A ball of mass 0.20 kg is thrown vertically upwards with an initial velocity of 20 m s-1. Calculate the maximum potential energy it gains as it goes up.
State whether the object possess kinetic energy, potential energy, or both :
A man climbing a hill _____________.
What kind of energy is possessed by the following?
Water stored in the reservoir of a dam __________.
Give two examples where a body possesses both, kinetic energy as well as potential energy.
A ball of mass 0.5 kg slows down from a speed of 5 m/s so that of 3 m/s. Calculate the change in kinetic energy of the ball. State your answer giving proper units.
How much electrical energy in joules does a 100 watt lamp consume : in 1 second?
What do you understand by the term 'transformation of energy"? Explain with an example.
Name the energy transfers which occur when : there is a picture on a television screen
A body of mass 10 kg at rest is acted upon simultaneously by two forces 4 N and 3 N at right angles to each other. The kinetic energy of the body at the end of 10 s is
