मराठी
महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (मराठी सेमी-इंग्रजी) इयत्ता ९ वी

Explain the difference between potential energy and kinetic energy.

Advertisements
Advertisements

प्रश्न

Explain the difference between potential energy and kinetic energy. 

फरक स्पष्ट करा
Advertisements

उत्तर

S. No. Potential Energy Kinetic Energy
1. It is possessed by a body by virtue of its configuration and position. It is possessed by a body by virtue of its motion.
2. It exists in several forms, including gravitational potential energy and electric potential energy, but work is not completed until it is converted into kinetic energy. It only exists in one form and does not need to be converted into another in order to perform tasks.
3. Gravitational potential energy = mgh Kinetic energy = `1/2 mv^2`
4. Potential energy can be negative. Kinetic energy cannot be negative.
5. Example: A book kept on a shelf has potential energy. Example: A moving car possesses kinetic energy. 
shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 2: Work and Energy - Exercises [पृष्ठ २८]

APPEARS IN

बालभारती Science and Technology [English] Standard 9 Maharashtra State
पाठ 2 Work and Energy
Exercises | Q 1. a. | पृष्ठ २८

संबंधित प्रश्‍न

What is the kinetic energy of an object?


The kinetic energy of an object of mass m moving with a velocity of 5 m s−1 is 25 J. What will be its kinetic energy when its velocity is doubled? What will be its kinetic energy when its velocity is increased three times?


The energy of a flying kite is kinetic energy.


When a boy doubles his speed, his kinetic energy becomes


State two factors on which the kinetic energy of a moving body depends.


A cyclist doubles his speed. How will his kinetic energy change: increase, decrease or remain same?


Give reasons for the following A horse and a dog are running with the same speed. Which one of them has more kinetic energy than the other.


Two bodies of equal masses are moving with uniform velocities v and 2v. Find the ratio of their kinetic energies.


A truck weighing 1000 kgf changes its speed from 36 km h-1 to 72 km h-1 in 2 minutes. Calculate:

  1. the work done by the engine and
  2. its power (g = 10 m s-2)

What is the kinetic energy of a body of mass 1 kg moving with a speed of 2 m/s?


On a level road, a scooterist applies brakes to slow down from a speed of 10 m/s to 5 m/s. If the mass of the scooterist and the scooter be 150 kg, calculate the work done by the brakes. (Neglect air resistance and friction)


A horse and a dog are running with the same speed. If the weight of the horse is ten times that of the dog, What is the ration of their kinetic energies?


Derive the formula for the kinetic energy of an object of mass m, moving with velocity v.


Find out the form of energy possessed by the following thing.

A rolling ball


An apple falling from a tree is an example for kinetic energy.


The energy possessed by a cricket ball bowled by a player is ______.


Water stored in water dams possesses kinetic energy.


A car of mass 120 kg is moving at a speed 18 km/h and it accelerates to attain a speed of 54 km/h in 5 seconds. Calculate:

  1. the work done by the engine.
  2. the power of the engine.

If the mass as well as the velocity of a body is doubled then the kinetic energy of the body ______ the initial kinetic energy.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×