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WORK, POWER AND ENERGY
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IF THE SPEED OF AN OBJECT IS DOUBLED, WHAT HAPPENS TO ITS KINETIC ENERGY?
KE BECOMES QUADRUPLED
IF YOU INCREASE THE DISTANCE AN OBJECT MOVES, WHAT HAPPENS TO ITS POWER?
POWER INCREASES
KINETIC ENERGY IS EXPRESSED IN THE EQUATION _______.
K.E = MASS x VELOCITY SQUARED/2
THE EQUATION FOR POTENTIAL ENERGY IS ____________.
P.E = MASS x GRAVITY x HEIGHT
THE EQUATION FOR THE AMOUNT OF WORK IS ____________.
WORK = FORCE x DISTANCE
THE EQUATION FOR THE AMOUNT OF POWER OUTPUT IS?
POWER = WORK/TIME
THE EQUATION FOR THE AMOUNT OF POWER OUTPUT IS?
POWER = WORK/TIME
DIGESTED FOOD WE EAT provides us with energy for basic metabolism. POTENTIAL E. OR KINETIC E.
KINETIC ENERGY
A stick of dynamite was released when the fuse comes into contact with the chemicals. POTENTIAL ENERGY OR KINETIC ENERGY
KINETIC ENERGY
A rock sitting at the edge of a cliff. POTENTIAL E. OR KINETIC ENERGY?
POTENTIAL ENERGY
It is an energy due to the motion.
KINETIC ENERGY
IT IS CONSIDERED AS ENERGY AT REST OR STORED ENERGY
POTENTIAL ENERGY
It is the sum of an object’s kinetic energy and potential energy.
MECHANICAL ENERGY
IT IS THE CAPACITY TO DO WORK.
ENERGY
It is the ability to do work.
POWER
IS THERE A WORK DONE? ( a boy carrying a book)
NO WORK DONE
Is there a work done?
NO WORK DONE
Is there a work done?
YES, BECAUSE FORCE IS EXERTED AND DISTANCE TRAVELLED
What is the common unit for work?
N.m or Joule
It is done when a force applied and distance travelled by an object is the same direction.
WORK


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