Question

A 3 kg melon is balanced on a bald man's
head. His friend shoots a 50 gm arrow at
it with speed 25 m/s. The arrow passes
through the melon and emerges at 10
m/s. The speed of the melon (in m/s) as it
flies off the man's head​

Answer 1

Answer:

0.25

Explanation:

About melon

m=3kg

u1=0m/s(initial velocity)

v1=?

About arrow

m=50g=5/100kg

u2=25m/s

v2=10m/s

law of conservation of momentum

m1u1+m2u2=m1v1+m2v2

0+5/4=3v1+1/2

5/4-1/2=3v1

3/4=3v1

v1=1/4=0.25