Author Topic: HorsePower Smarts  (Read 1100 times)

0 Members and 1 Guest are viewing this topic.

Online Login to see usernames

  • Hero member
  • ****
  • Posts: 2388
  • Testing
HorsePower Smarts
« on: September 25, 2009, 08:52:44 am »
I want to share this, From a book i have.

The Unit of mechanical power is the horsepower. One HorsePower (HP) is the equivalent of 33,000 Foot Pounds (Ft.Lb.) of work per minute. If a 2000-LB. weight is lifted 10 Ft in two Minutes, the power required would be;

                       Weight In Pounds X Distance in feet
HorsePower =   _____________________________
                           Time in Munutes X 33,000


                         2000 X  10 = 20,000                 
HorsePower = ______________________       = 0.3 HP
                         2 X 33,000 = 66,000

In SI Units, Power is expressed In watts. A watt is the force of one newton moving through a distance of one meter in one second.

The common unit of mechanical power is the Kilowatt. A kilowatt is equal to 1000 watts. The formula for power is force times distance divided by time. It is expressed in watts. 1 Watt = one Joule per second = 1j/sec/

Example. What is the power required to lift a mass of 100 kilograms at the rate of 10 meters per second?

                Force X distance   Newtons X meters
Power =  _______________=________________
                       Time                   Seconds

Force = 100 KG X force Due to gravity.
                9.8 ms

Force = 100Kg X 9.8 ms
Equivalent: 1 Kgm/s = 1j
Force = 980 kgm/s = 980 j
distance = 10 meters
Time = 1 second
                 980 j X 10 meters
Power = ______________________
                   1 second

Equivalent: 1 Jm/s = 1 W
Power     = 9800 W or 9.8 kW

1 hp = 746 watts
1 W = 0.0013 hp

Online Login to see usernames

  • Hero member
  • ****
  • Posts: 2388
  • Testing
Re: HorsePower Smarts
« Reply #1 on: September 25, 2009, 09:02:54 am »
I would Like to Share Facts On Energy from This book. Dont ask me what book i have, i will not tell you, I can not tell you.

Energy is the capacity Or Ability to do work. The electric Motor Suplies the energy to drive things.

. Potential Energy is Stored energy. Examples are water behind a dam, electrical energy in a battery, and weight which can fall or drop.

Kinetic Energy is energy doing work. Examples are water flowing over a dam, a battery lighting a bulb, and falling weight.
Heat energy, Btu's. British Thermal units.

Those are the def.

Online Login to see usernames

  • Hero member
  • ****
  • Posts: 2388
  • Testing
Re: HorsePower Smarts
« Reply #2 on: September 25, 2009, 09:15:02 am »
Density is a substances mass per unit of volume. Some substances are heavier than others. Comparative weights of gases, liquids, and solids may be shown by either density or specific gravity. Density is expressed as pounds per cubic foot. Or kilograms per cubic meter.

Force, Force applied to a body at a rest causes it to move. the unit of force is the pound force. in si metric units, it is the newton N. The pound force is that force which, applied to a one pound mass, will results in an acceleration of 32.137 ft.

at the surface of the earth, where the acceleration of gravity is 32.173 ft., a 1 lb mass weights 1 lb. Force it exerts 1 lb force on the surface upon which it rest. If the object of 1 lb mass were on the moon where the gravity is about 1/6 that on earth, the weight would be 1/6 lb.

Gas, A gas is any physical substance which must be enclosed in a sealed container to prevent its escape into the atmosphere. The molecules, having little or no attraction for each other, Travel, Fly in a straight line. They bounce off each other, off molecules of other substances, or off the container walls. they have little or no attraction for any other substance. The pressures shown in the gas filled Baloon illustrate how gases behave.

Almost any substance can be made to exist as a Solid, a liquide, or a gas. Any molecule can be made to Viberrate, Swim, or fly. It depends on two things;

Temperature And Pressure! , To understand this change of state, one must study Temperature and Pressure Relationships...
Effect Of Pressure on Freezing Temperature of Water.

The Temerature at which water freezes is affected by the pressure on the surface of the water. Increasing the pressure Lowers the Freezing Temperature. Decreasing the pressure raises the Freezing Temperature. The relationship goes the opposite way from the general rule given in ... This is because water Expands when it freezes. Most substances Expand when they Melt, and obey the rule. For then the higher the Pressure,,, The Higher the Melting Temperature...