Question

If you apply 2 joule of energy to lift a book of 0.05kg and how high will it rise. (Take g = 10 m/s²)​

Answer 1

$\sf\fbox{\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:Answer\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:}$

$\bold\pink{Given:}$

$\sf{Potential \: Energy ,PE = 2 J}$

$\sf{Mass ,m = 0.05 kg}$

$\sf{The \: acceleration \: due \: to \: gravity,g}$ $\sf{= 10 m/s^2}$

$\bold\pink{To\: Find:}$

$\sf{How \: high \: will \: the \: book \: rise = ?}$

$\bold\pink{Concept:}$

$\sf{The \: energy \: possess \: by \: body \: due \: to}$ $\sf{its \: position \: is \: called \: Potential \: Energy}$

$\bold\pink{Solution:}$

Formula to be used,

$\small\underline{\boxed{\sf\;\;PE = mgh}}$

$\underline{\underline{\textsf {Putting values in the above formula: }}}$

$\sf{\implies 2 = 0.05 \times 10 \times h}$

$\sf{\implies 2 = 0.5 \times h}$

$\sf{\implies h = \dfrac{2}{0.5}}$

$\sf{\implies h = \dfrac{20}{5}}$

$\sf{\implies h = 4 m}$

$\sf{Hence,}$

$\sf{The \: book \: will \: rise \: 4 \: meters\:high}$

Answer 2

Answer:

4 metres

Explanation:

Gravitational Potential Energy (G.P.E) = Mass (m) * Acceleration due to gravity (g) * Height (h)

2 = 0.05 * 10 * h

h = 2/0.5

h = 4 m