Question

A shell at rest at the origin explodes into three
A shell at
fragments of masses 1 kg, 2kg and m kg. The 1 kg 3
and 2 kg pieces fly off with speeds of 5 ms-1 along
X-axis and 6 ms -1 along y-axis respectively. If the
m kg piece flies off with a speed of 6.5 ms -1, the
total mass of the shell must be
a) 4 kg b) 5 kg c) 3.5 kg d) 4.5 kg​

Answer 1

Answer:

answer is 5

Explanation:

because a shell fragments into three pieces 1 kg 82 kg and mkg as per questions in given 1 kg and 2 kg e try of perpendicularly that's why if we have to find mass of third fragment then (mu)^2=(m1v1)^2+(m2v2)^2

(m×6.5)^2=(1×5)^2+(2×6)^2

(m×6.5)^2=169

(m×6.5)=√169=13

m=13/6.5=2 therefore total mass equals to m1 + m2 +m 3 equals to1+2+2=5kg

Hope so if I am right mark me as a brainlist