Question

An arrow shot from a bow attains a maximum height of $10m$ from the level it is released. If the mass of the arrow is $500grams$, work done by the bow on arrow is _________ $J$. (Assume, $g=10m/s^2$)

• A. $25J$
• B. $30J$
• C. $40J$
• D. $50J$

Answer 1

The correct option is D $50J$

Given:
Mass of bow $m=500g=0.5kg$,
Acceleration due to gravity $g=10m{s}^{-2}$,
Maximum height $h=10m$.
The work done by the bow on arrow is equal to the change in its gravitational potential energy.
Work done is :$m\times g\times h=0.5\times 10\times 10=50J$