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QAIPM-2000-Ph-2998: NEET 2000 Physics - Class 11 AIPM-2000-Ph-2998 Solution: A mass of 1 kg is thrown up with a velocity of 100 m/s. After 5 …
A mass of 1 kg is thrown up with a velocity of 100 m/s. After 5 seconds, it explodes into two parts. One part of mass 400 g comes down with a velocity 25 m/s. The velocity of other part is (Take g = 10 )
Multiple Choice Options
- A 40 m/s
- B 50 m/s
- C 100 m/s
- D 60 m/s
Step-by-Step Verified Solution
Velocity after 5 sec,
v = u � gt
= 100 � 10 _ 5 = 50 m/s
By conservation of momentum
1 _ 50 = 0.4 _ (�25) + 0.6 _ v'
60 = 0.6 _ v' _ v' = 100 m/s upwards