Flashcards in Work/Energy Deck (22):

1

## What is the equation for impulse?

### Δp=FΔt

2

## What is Work?

### Means by which energy is transferred (units= Joules)

3

## What is Energy?

### The ability to do work

4

## What is the equation for work?

### W=Fd

5

## What is Impulse?

### Product of force and time; proportional to the product of mass and velocity

6

## What does the area of a force vs displacement graph represent?

### Work; Fd

7

## What is Power?

### Rate at which work is done; expressed as number of Joules per second or Watts (W)

8

## What is the equation for power?

### P=W/t or P=F(d/t) or P=Fv

9

## What is Kinetic Energy?

### Energy an object has by being in motion relative to a frame of reference

10

## What is the equation for Kinetic Energy?

### Ke=1/2mv^2

11

## What is Potential Energy?

### Stored energy related to the position of an object in a frame of reference

12

## What is the equation for potential energy?

### Pe/Ug=mgh

13

## What is the Work-Energy Theorem?

### Work done by the sum of all forces acting on an object is equal to the change in that object's kinetic energy; W=ΔKe and W=ΔPe

14

## In the absence of frictional forces, total mechanical energy is _______________.

### Conserved; equal before and after the motion; ΔPe=ΔKe or mgh=1/2mv^2

15

## What is Mechanical Energy?

### Sum of potential energy and kinetic energy; total energy of an object/system

16

## What is a Conservative Force?

### Work done by an object is is independent from the path it takes; mechanical energy is conserved and remains constant with time

17

## What is a Nonconservative Force?

### Work done by an object is not independent from the path it takes

18

## What is an example of a nonconservative force?

### Friction or Air Resistance

19

## What is the equation for nonconservative forces?

### W=E2-E1

20

## What is the equation for conservation of a spring?

### 1/2mv^2=1/2kx^2

21

##
In what circumstance is there no work even though there is force?

### The force is not parallel to the motion; the force is perpendicular to the motion

22