The amount of energy needed to power a 0.10-kw bulb for one minute would be just sufficient to lift a 1.0-kg object through a vertical distance of

Respuesta :

Answer:

612.2 m

Explanation:

The work needed to lift the object is equal to its increase in gravitational potential energy:

[tex]W=\Delta U=mg \Delta h[/tex] (1)

where

m = 1.0 kg is the mass

g = 9.8 m/s^2

[tex]\Delta h[/tex] is the vertical distance

The power provided is

[tex]P=0.10 kW = 100 W[/tex]

In one minute (t = 1 min = 60 s), the work provided is

[tex]W=Pt=(100 W)(60 s)=6000 J[/tex]

Substituting this into (1) and solving for [tex]\Delta h[/tex], we find

[tex]\Delta h=\frac{W}{mg}=\frac{6000 J}{(1.0 kg)(9.8 m/s^2)}=612.2 m[/tex]