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# MECHANICAL ENERGY

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## Bidisha Rahang

on 11 November 2013

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#### Transcript of MECHANICAL ENERGY

MECHANICAL ENERGY
ROLL NO= 1-7

What Is Mechanical Energy
Mechanical energy is the sum of potential energy and kinetic energy.
It is the energy associated with the motion and position of an object.

The law of conservation of mechanical energy states that in an isolated system that is only subject to conservative forces the mechanical energy is constant.
Let's Practice
MECHANICAL ENERGY
POTENTIAL ENERGY KINETIC ENERGY
Potential Energy
A rock has a mass of 840 kg. The centre of mass is 29.0m above ground. How much energy does it have?

PE=mgh
m=840 kg
g=9.8m/s2
h=29.0m

PE=(840kg)(9.8m/s2)(29m)
=238,728J
Kinetic Energy
What is the kinetic energy of this car having a mass of 1550kg and travelling at 38.0m/s

KE=mv2/2
=(1550 kg)(38.0 m/s)2/2
KE=1,119,100J
MECHANICAL ENERGY
VIDEOS
Example:
1.walking and running
2.rotation and revolution of the earth
3.moving objects such as vehicles
4.moving water such as river
5.rolling object
Potential Energy
The energy possessed by the object by virtue of its position or change in shape is called potential energy.
Example:

Water in the lake on a mountain possesses energy because of its position.

PE= m X g X h.
Formula:
Kinetic Energy
Example:

In physics, the kinetic energy of an object is the energy which it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.

1. A moving car
2. a moving ball
3. a river flowing
4. a plane in flight
5. an athlete running
Formula:
KE=1/2* m*v
2
Energy is defined as the capacity for a physical system to perform work .
Energy lights our cities, powers our vehicles, and runs machinery in factories. It warms and cools our homes, cooks our food, plays our music, and gives us pictures on television.
SI unit of energy is joule

ENERGY
TYPES OF ENERGY
HONDA
(COMPANY)
CASE STUDY ON MECHANICAL ENGINEERING
Honda Motor Company, Limited is a Japanese publicmultinational corporation primarily known as a manufacturer of automobiles and motorcycles.Honda has been the world's largest motorcycle manufacturer since 1959, as well as the world's largest manufacturer of internal combustion engines measured by volume, producing more than 14 million internal combustion engines each year.
OWNER

Soichiro Honda born on November 17, 1906 till August 5, 1991 was a Japanese engineer and industrialist. In 1948, he established Honda and oversaw its expansion from a wooden shack manufacturing bicycle motors to a multinational automobile and motorcycle manufacturer.

Takeo Fujisawa born on November 10, 1910 till December 30, 1988 was a Japanese businessman who co-founded Honda Motor Co., Ltd. alongside Soichiro Honda. Together, they took the company from a small manufacturer of bicycle engines to a worldwide car manufacturer.

HONDA (INFORMATION)
PRODUCTION
Honda was the first Japanese automobile manufacturer to release a dedicated luxury brand, Acura, in 1986. Aside from their core automobile and motorcycle businesses, Honda also manufactures garden equipment, marine engines, personal watercraft and power generators, amongst others.
1.motorcycles

2. cars

3.solar cells

4.engines

5.robots

6.aircrafts

7. power equipment
solar energy
electrical energy
thermal energy
mechanical energy
Acknowledgement
Group coordinator
-Bidisha Rahang
Making of Prezi
-Bidisha Rahang

Energy and types
-Amartya Manaava
Mechanical Energy
-Apeksha Singhvi
Potential Energy
-Ayesha Hussain
Kinetic Energy
-Bidisha Rahang
Let's practice and video
-Bidisha Rahang
Case Study