Advertisements
Advertisements
प्रश्न
A pendulum is oscillating on either side of its rest position. The correct statement is:
विकल्प
It has only the kinetic energy at its each position.
It has the maximum kinetic energy at its extreme position.
It has the maximum potential energy at its mean position.
The sum of its kinetic and potential energy remains constant throughout the motion.
Advertisements
उत्तर
The sum of its kinetic and potential energy remains constant throughout the motion.
Explanation:
In accordance with the law of conservation of mechanical energy, whenever there is an interchange between potential energy and kinetic energy, the total mechanical energy remains constant.
APPEARS IN
संबंधित प्रश्न
In what way does the temperature of water at the bottom of a waterfall differ from the temperature at the top? Explain the reason.
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.
What kind of energy is possessed by the following?
A stretched rubber band _____________
Fill in the blanks with suitable words:
When a ball is thrown upwards, ___________ energy is transformed into ___________ energy.
Write the energy transformations which take place in an electric bulb (or electric lamp).
A ball falls to the ground as shown below :
What is the potential energy of ball at B?
A ball falls to the ground as shown below :
Which law you have made use of in answering this question?
A microphone converts :
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)
A girl with having a mass of 35 kg sits on a trolley of mass 5 kg. The trolley is given an initial velocity of 4 m s–1 by applying a force. The trolley comes to rest after traversing a distance of 16 m. (a) How much work is done on the trolley? (b) How much work is done by the girl?
