Advertisements
Advertisements
प्रश्न
A pendulum is oscillating on either side of its rest position. The correct statement is:
पर्याय
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
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.
State whether the object possess kinetic energy, potential energy, or both :
A stretched spring lying on the ground ____________.
A boy weighing 40 kg makes a high jump of 1.5 m.
What is his potential energy at the highest point? (g = 10 m/s2)
What are the various forms of energy?
Name the device or machine which convert :
Chemical energy into kinetic energy (or mechanical energy).
Fill in the blanks with suitable words :
The principle of ___________ of energy says energy can be transformed from one form to another, but it cannot be ___________ or ___________.
The hanging bob of a simple pendulum is displaced to one extreme position B and then released. It swings towards centre position A and then to the other extreme position C. In which position does the bob have :
(i) maximum potential energy?
(ii) maximum kinetic energy?
Name the energy transfers which occur when :
an electric ball rings
Which one of the following is not the unit of energy?
The device which converts mechanical energy into energy which runs our microwave oven is :
