1
JEE Main 2015 (Offline)
+4
-1

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
$$80$$ $$N$$
2
JEE Main 2014 (Offline)
+4
-1
A block of mass $$m$$ is placed on a surface with a vertical cross section given by $$y = {{{x^3}} \over 6}.$$ If the coefficient of friction is $$0.5,$$ the maximum height above the ground at which the block can be placed without slipping is:
A
$${1 \over 6}m$$
B
$${2 \over 3}m$$
C
$${1 \over 3}m$$
D
$${1 \over 2}m$$
3
AIEEE 2012
+4
-1
A particle of mass $$m$$ is at rest at the origin at time $$t=0.$$ It is subjected to a force $$F\left( t \right) = {F_0}{e^{ - bt}}$$ in the $$x$$ direction. Its speed $$v(t)$$ is depicted by which of the following curves?
A
B
C
D
4
AIEEE 2010
+4
-1
Two fixed frictionless inclined planes making an angle $${30^ \circ }$$ and $${60^ \circ }$$ with the vertical are shown in the figure. Two blocks $$A$$ and $$B$$ are placed on the two planes. What is the relative vertical acceleration of $$A$$ with respect to $$B$$ ?
A
$$4.9m{s^{ - 2}}$$ in horizontal direction
B
$$9.8m{s^{ - 2}}$$ in vertical direction
C
Zero
D
$$4.9m{s^{ - 2}}$$ in vertical direction
EXAM MAP
Medical
NEET