1
JEE Main 2015 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
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
$$50\% $$
2
JEE Main 2015 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
Distance of the center of mass of a solid uniform cone from its vertex is $$z{}_0$$. If the radius of its base is $$R$$ and its height is $$h$$ then $$z{}_0$$ is equal to :
A
$${{5h} \over 8}$$
B
$${{3{h^2}} \over {8R}}$$
C
$${{{h^2}} \over {4R}}$$
D
$${{3h} \over 4}$$
3
JEE Main 2015 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
From a solid sphere of mass $$M$$ and radius $$R$$ a cube of maximum possible volume is cut. Moment of inertia of cube about an axis passing through its center and perpendicular to one of its face is:
A
$${{4M{R^2}} \over {9\sqrt {3\pi } }}$$
B
$${{4M{R^2}} \over {3\sqrt {3\pi } }}$$
C
$${{M{R^2}} \over {32\sqrt {2\pi } }}$$
D
$${{M{R^2}} \over {16\sqrt {2\pi } }}$$
4
JEE Main 2015 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
JEE Main 2015 (Offline) Physics - Laws of Motion Question 96 English
Given in the figure are two blocks $$A$$ and $$B$$ of weight 20 N and 100 N, respectively. These are being pressed against a wall by a force $$F$$ as shown. If the coefficient of friction between the blocks is 0.1 and between block $$B$$ and the wall is 0.15, the frictional force applied by the wall on block $$B$$ is :
A
$$120$$ $$N$$
B
$$150$$ $$N$$
C
$$100$$ $$N$$
D
$$80$$ $$N$$
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