हिंदी

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

Advertisements
Advertisements

प्रश्न

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

विकल्प

  • will be twice its original energy 

  • will not change 

  • will be 4 times its original energy

  • will be 16 times its original energy. 

MCQ
रिक्त स्थान भरें
Advertisements

उत्तर

If we increase the velocity of a car moving on a flat surface to four times its original speed, its potential energy will not change.

Explanation:

The energy stored in an object because of its specific state or position is called its potential energy. The potential energy is expressed by the following formula (P.E.) = mgh. That is, the potential energy of an object does not depend on its velocity, but on its height above the ground.

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] 9 Standard Maharashtra State Board
अध्याय 2 Work and Energy
Exercises | Q 3. c. | 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.


Gravitational potential energy U = mass × force of gravity on unit mass × ..........


Two bodies A and B of masses 10 kg and 20 kg respectively are at the same height above the ground. Which of the two has greater potential energy?


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 the force of gravity on mass of 1 kg is g newton, find the force needed to lift the body.


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.


The potential energy of a body is the energy by virtue of its ______.


A body at a height possesses ______.


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?


Is potential energy a vector or a scalar quantity?


On what factors does the gravitational potential energy of a body depend?


A body of mass 2 kg is thrown vertically upwards with an initial velocity of 20 m/s. What will be its potential energy at the end of 2 s? (Assume g = 10 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?

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


The potential energy is


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×