हिंदी

The potential energy of your body is least when you are ______.

Advertisements
Advertisements

प्रश्न

The potential energy of your body is least when you are ______.

विकल्प

  • sitting on a chair 

  • Sitting on the ground

  • sleeping on the ground

  • standing on the ground

MCQ
रिक्त स्थान भरें
Advertisements

उत्तर

The potential energy of your body is least when you are sleeping on the ground.

Explanation:

Based on its position, any object can store energy. Potential energy is the stored energy in that position. For example, a drawn bow stores energy due to its position. When the bow is in its usual posture, that is, when it is not drawn, no energy is stored in it. However, if its position is altered from its typical equilibrium state, it can store energy as a result of its position.

When it comes to gravitational potential energy. A relationship between an object's height and gravitational potential energy is observed. The gravitational potential energy of an object increases with its elevation.

A person seated in a chair is the most elevated of the possibilities shown. As a result, it possesses the most potential energy. When sleeping or lying down on the ground, a person's height from the ground is at its lowest. As a result, when a person sleeps on the ground, his or her potential energy is limited.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 2: Work and Energy - Exercises [पृष्ठ २८]

APPEARS IN

बालभारती Science and Technology [English] Standard 9 Maharashtra State
अध्याय 2 Work and Energy
Exercises | Q 3. a. | पृष्ठ २८

संबंधित प्रश्न

A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your answer.


The potential energy of a freely falling object decreases progressively. Does this violate the law of conservation of energy? Why?


State two factors on which the potential energy of a body at a certain height above the ground depends.


A bucket full of water is on the first floor of your house and another identical bucket with the same quantity of water is kept on the second floor. Which of the two has greater potential energy?


Write the expression for the gravitational potential energy explaining the meaning of the symbols used.


A body of mass m is moved from ground to a height h. If force of gravity on mass of 1 kg is g newton, find the potential energy stored in the body.


The gravitational potential energy stored in a box of weight 150 kgf is 1.5 × 104 J. Find the height of the box. Take 1 kgf = 10 N.


A spring is kept compressed by a small trolley of mass 0.5 kg lying on a smooth horizontal surface as shown in the adjacent fig. When the trolley is released, it is found to move at a speed v = 2 m s-1. What potential energy did the spring possess when compressed?


A body falls freely under gravity from rest. Name the kind of energy it will possess at the point from where it falls.


A ball of mass m is thrown vertically up with an initial velocity so as to reach a height h. The correct statement is:


Two bodies A and B of equal masses are kept at heights of h and 2h respectively. What will be the ratio of their potential energies?


What happens to the potential energy of a body when its height is doubled?


Explain by an example what is meant by potential energy. Write down the expression for gravitational potential energy of a body of mass m placed at a height h above the surface of the earth.


What is the difference between gravitational potential energy and elastic potential energy? Give one example of a body having gravitational potential energy and another having elastic potential energy.


If 784 J of work was done in lifting a 20 kg mass, calculate the height through which it was lifted. (g = 9.8 m/s2)


A man is instructed to carry a package from the base camp at B to summit A of a hill at a height of 1200 metres. The man weighs 800 N and the package weighs 200 N. If g = 10 m/s2,

  1. how much work does man do against gravity?
  2. what is the potential energy of the package at A if its is assumed to be zero at B?

If we increase the velocity of a car moving on a flat surface to four times its original speed, its potential energy ______.


How much energy is gained by a box of mass 20 kg when a man, raises the box by 0.5 m in order to place it inside the bus? (g=10 m/s-2)


Which of the following is the example potential energy?


The potential energy is


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×