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प्रश्न
What kind of energy is possessed by the following?
Water stored in the reservoir of a dam __________.
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उत्तर
Water stored in the reservoir of a dam possesses gravitational potential energy.
संबंधित प्रश्न
State the condition under which the mechanical energy is conserved.
A pendulum is oscillating on either side of its rest position. The correct statement is:
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.
What kind of energy is possessed by the following?
A compressed spring ____________.
What kind of energy is possessed by the following?
A stretched rubber band _____________
Fill in the blank with suitable word :
The ability of a body to do work is called __________. The ability of a body to do work because of its motion is called __________.
What type of energy is possessed : by the piece of stone which is thrown away on releasing the stretched rubber strings of catapult?
Water stored in a dam possesses ______.
Name the device or machine which convert :
Mechanical energy into electrical energy.
Name the device or machine which convert :
Electrical energy into sound energy.
Name the device or machine which convert :
Chemical energy into heat energy.
Name the device or machine which convert :
light energy into heat energy.
Fill in the blanks with suitable words:
When a ball is thrown upwards, ___________ energy is transformed into ___________ energy.
What kind of energy transformation take place at a hydroelectric power station?
How much electrical energy in joules does a 100 watt lamp consume : in 1 minute?
A bulb lights up when connected to a battery. State the energy change which takes place :
Which one of the following is not the unit of energy?
An automobile engine propels a 1000 kg car (A) along a levelled road at a speed of 36 km h–1. Find the power if the opposing frictional force is 100 N. Now, suppose after travelling a distance of 200 m, this car collides with another stationary car (B) of the same mass and comes to rest. Let its engine also stop at the same time. Now the car (B) starts moving on the same level road without getting its engine started. Find the speed of the car (B) just after the collision.
