English

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

Question

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

Options

  • will be twice its original energy 

  • will not change 

  • will be 4 times its original energy

  • will be 16 times its original energy. 

MCQ
Fill in the Blanks
Advertisements

Solution

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
  Is there an error in this question or solution?
Chapter 2: Work and Energy - Exercises [Page 28]

APPEARS IN

Balbharati Science and Technology [English] 9 Standard Maharashtra State Board
Chapter 2 Work and Energy
Exercises | Q 3. c. | Page 28

RELATED QUESTIONS

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?


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


Two bodies of same masses are placed at heights h and 2h. Compare their gravitational potential energy.


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.


Define the term potential energy of a body.


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 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?


A weightlifter is lifting weights of mass 200 kg up to a height of 2 metres. If g = 9.8 m s−2, calculate :
potential energy acquired by the weights.


A weightlifter is lifting weights of mass 200 kg up to a height of 2 metres. If g = 9.8 m s−2, calculate :
work done by the weightlifter


A boy weighing 50 kg climbs up a vertical height of 100 m. Calculate the amount of work done by him. How much potential energy does he gain? (g = 9.8 m/s2)


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


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 car is accelerated on a levelled road and acquires a velocity 4 times of its initial velocity. During this process, the potential energy of the car :


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


Potential energy and heat energy are the two forms of mechanical energy.


What energy is possessed by stretched rubber?


A body is falling from a height of h. After it has fallen a height `"h"/2`, it will possess


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×