Last Updated On 01-06-2023 - By Jeesha Sara
A stationary body explodes into four identical fragments such that three of them fly off mutually perpendicular to each other, each with same KE, 
The energy of explosion will be
a)
b)
c)
d)
A stationary body explodes into four identical fragments such that three of them fly off mutually perpendicular to each other, each with same KE, The energy of explosion will be
a)
b)
c)
d)
Question ID - 100229 :-
A stationary body explodes into four identical fragments such that three of them fly off mutually perpendicular to each other, each with same KE, The energy of explosion will be
a)
b)
c)
d)
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A stationary body explodes into four identical fragments such that three of them fly off mutually perpendicular to each other, each with same KE, |
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a) |
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b) |
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c) |
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d) |
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(a) Let the three mutually perpendicular directions be along
Where
By linear momentum conservation,
or or Total energy |
and 
-axis, respectively.
and 
Next Question :
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A ball falls under gravity from a height of 10 m with an initial downward velocity |
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a) |
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b) |
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c) |
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d) |
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It collides with theground, loses 50%of its energy in collision and then rises back to the same height. Find (i) the initial velocity 
and (ii) the height to which the ball would rise after collision if the initial velocity 
was directed upwards instead of downwards?
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