Work, Power, Energy

Question 1

mechanical work

Answer 1

-the product of a force applied against a resistance and the displacement of the resistance and the displacement of the resistance in the direction of force
-W=Fd= joules

Question 2

mechanical power

Answer 2

-the rate of work production
-calculator as work divided by the time over which the work was done
-P=w/t or FXV= Watts

Question 3

mechanical energy

Answer 3

-the cape its to do work
-units of energy are joules (J)
-three forms of energy: KE,PE, TE

Question 4

kinetic energy

Answer 4

energy of motion
KE=1/2mv^2

Question 5

potential energy

Answer 5

energy by a body’s position or configuration
-PE=(wt)(ht)

Question 6

law of conservation of mechanical energy

Answer 6

-when gravity is the only acting external force, a body’s mechanical energy remains constant
-KE+PE=C

Question 7

principle of work and energy

Answer 7

-the work if a force is equal to the change in energy that it produces in the object acted upon
W=ChangeKE+ChangePE+ChangeTE