Question

Calculate the height through which a body of mass 0.5kg is lifted if the energy spent in doing so is 1.0J .
Take g=10ms-2

Answer 1

Answer:

The answer is 0.2 m

Explanation:

Since P.E=1j

p.e=mgh

1=0.5×10×h

1=5×h

1/5=h

0.2 m=h

Answer 2

Answer:

The height through which the body is lifted is 20.4cm

Explanation:

Given that,

The mass of body is 0.5kg

Energy spent in lifting the body is 1.0J

We are required to find the height through which the body is lifted.For that,we use an relation

$P.E=mgh$

Where g is acceleration due to gravity and P.E is the energy/potential energy spent to lift the body through a height h.Substituting all the known values,we get

$1 = 0.5 \times 9.8 \times h \\ = > h = \frac{1}{0.5 \times 9.8} = 0.204 \: m \\ = 20.4cm$

Therefore,The height through which the body is lifted is 20.4cm

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