Flashcards in Work Done, Energy And Power Deck (8)

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1

Q

Forces do work.

What is the easiest equations for work done?

A

WD=F x distance

2

Q

Define energy

A

Energy is the ability a body has to do work

3

Q

What is the equation for Kinetic energy?

A

Ke = 1/2mv^2

4

Q

What is gravitational energy’s equations?

A

Ep =mgh

5

Q

Define a joule

A

One joule is the the work done by a force of one newton over a distance of one meter

6

Q

What is the definition of power?

A

Energy transferred per unit time

7

Q

Name two equations for mechanical power

A

P=Fv

P=E/t

8

Q

What is the equation for the percentage efficiency of and energy transfer?

A

(Useful energy out)/total energy in) x 100