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A shell at rest at the origin explodes i...

A shell at rest at the origin explodes into 3 fragments A,B and C of masses 1 kg, 2 kg and m kg respectively. A moves along the X-axis with a speed of 12 m/s, B moves along the Y-axis with a speed of 16 m/s and C flies off with a speed of 40 m/s. What is the total mass of the shell before explosion?

A

3.85 kg

B

4.6 k

C

5.35 kg

D

8.2 kg

Text Solution

Verified by Experts

The correct Answer is:
A
In the first case the work done is zero because there is no displacement.
In the second case, work done `= F xx s = mg xx h`
`= 2 xx 9.8 xx1 =19.6 J`
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