Question

An arrow fired from a bow attains a maximum height of $5m$ from the level it is released. If the mass of the arrow is $500grams$, work done by the bow on arrow is greater than which of the following? (Assume, $g=10m{s}^{-2}$)

• A. 20J
• B. 25J
• C. 30J
• D. 35J

Answer 1

Answer: (A), (B)

The correct options are
A

20J

B

25J

The work done by the bow on arrow would be equal to the maximum gravitational potential energy stored in it, which would be equal to $m\times g\times h$

Given, mass $m=500gm$$=\frac{500}{1000}=0.5kg$, $g=10m{s}^{-1}$ and height $h=5m$

$\therefore m\times g\times h=\frac{500}{1000}\times 10\times 5=25J$