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JEE Advanced 2020 Full Test 3 Paper 2
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© examsnet.com
Question : 14
Total: 54
A cannon shell is fired to hit a target at a horizontal distance
R
, however it breaks into two equal parts at its highest point, one part returns to the cannon. The other part
will fall at a distance R beyond target
will fall at a distance
3
R
beyond target
will hit the target
have nine times kinetic energy of first
Validate
Solution:
At highest point, linear momentum
2
m
v
=
m
v
1
−
m
v
v
1
=
3
v
At highest point, velocity of other part after explosion
=
3
v
Centre of mass of particles will be at a distance R from initial point on ground.
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