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.


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 work done in lifting the body.


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:


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).


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.


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?

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 :


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)


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×