Answer:
20 m/s
Explanation:
The stored energy is transformed to kinetic energy and since kinetic energy is given by
[tex]0.5mv^{2}[/tex]
where m is the mass of arrow in Kg and v is the velocity of the arrow in m/s. From the principle of energy, all the energy is transformed to KE.
KE= Energy stored in bow
Changing mass from 50 g to Kg we divide by 1000 hence m=50/1000=0.05 Kg
Substituting 0.05 Kg for m and 10 J for KE then we have
0.5\times 0.05\times v^{2}=10 J
Making v the subject of the formula then
[tex]v=\sqrt {\frac {10 J}{0.5\times 0.05 Kg}}=20\ m/s[/tex]
Therefore, the velocity is equivalent to 20 m/s
