If 2.0 j of work is done in raising a 180 g apple, how far is it lifted

1.14 meters

Explanation:

You have already learned that work and energy have same units i.e. Joule (J).

If the object has travelled some distance (upwards) then there must be some potential difference (increased potential energy).

Thus the energy needed to lift the ball can be found by this formula:

E

p

=  

m

⋅

g

⋅

h

Where  

E

p

means potential energy needed (or simply work done). m stands for mass, g for gravitational energy, and h for the height reached.

Now we know the energy(2 J), the mass (0.18 kg), and gravitational energy (9.8 m/s^2). Putting into the formula we get:

2

=

0.18

⋅

9.8

⋅

h

2

0.18

⋅

9.8

=

h

2

1.76

=

h

1.14

=

h

Finally,

height reached above the ground = 1.14 m

because it says use -2,0,and 2 for x, we can plug those numbers into the equation. y/4=3/4(-2)+2   y/4= -1 1/2 +2 now to get x by itself, we can multiply each side by 4. y=-6+8 which equals y=2 when x=-2. now you can do the same thing with 0 and 2 as x. you get y=8 when x=0 and y=14 when x=2.

x   |   y

-2 |   2

0   |   8

2   |   14

an energy transformation flow diagram is shown

where is it ?