1
JEE Main 2017 (Online) 9th April Morning Slot
+4
-1
Two particles A and B of equal mass M are moving with the same speed $$\upsilon$$ as shown in the figure. They collide completely inelastically and move as a single particle C. The angle $$\theta$$ that the path of C makes with the X-axis is given by :

A
tan $$\theta$$ = $${{\sqrt 3 + \sqrt 2 } \over {1 - \sqrt 2 }}$$
B
tan $$\theta$$ = $${{\sqrt 3 - \sqrt 2 } \over {1 - \sqrt 2 }}$$
C
tan $$\theta$$ = $${{1 - \sqrt 2 } \over {\sqrt 2 \left( {1 + \sqrt 3 } \right)}}$$
D
tan $$\theta$$ = $${{1 - \sqrt 3 } \over {1 + \sqrt 2 }}$$
2
JEE Main 2016 (Online) 10th April Morning Slot
+4
-1
A neutron moving with a speed ‘v’ makes a head on collision with a stationary hydrogen atom in ground state. The minimum kinetic energy of the neutron for which inelastic collision will take place is :
A
10.2 eV
B
16.8 eV
C
12.1 eV
D
20.4 eV
3
JEE Main 2016 (Online) 10th April Morning Slot
+4
-1
In the figure shown ABC is a uniform wire. If centre of mass of wire lies vertically below point A, then $${{BC} \over {AB}}$$ is close to :

A
1.85
B
1.37
C
1.5
D
3
4
JEE Main 2015 (Offline)
+4
-1
A particle of mass $$m$$ moving in the $$x$$ direction with speed $$2v$$ is hit by another particle of mass $$2m$$ moving in the $$y$$ direction with speed $$v.$$ If the collision is perfectly inelastic, the percentage loss in the energy during the collision is close to:
A
$$56\%$$
B
$$62\%$$
C
$$44\%$$
D
$$50\%$$
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