1
JEE Main 2023 (Online) 29th January Morning Shift
+4
-1

A block of mass $m$ slides down the plane inclined at angle $$30^{\circ}$$ with an acceleration $$\frac{g}{4}$$. The value of coefficient of kinetic friction will be:

A
$$\frac{2 \sqrt{3}-1}{2}$$
B
$$\frac{\sqrt{3}}{2}$$
C
$$\frac{1}{2 \sqrt{3}}$$
D
$$\frac{2 \sqrt{3}+1}{2}$$
2
JEE Main 2023 (Online) 25th January Evening Shift
+4
-1

Consider a block kept on an inclined plane (incline at 45$$^\circ$$) as shown in the figure. If the force required to just push it up the incline is 2 times the force required to just prevent it from sliding down, the coefficient of friction between the block and inclined plane($$\mu$$) is equal to :

A
0.60
B
0.33
C
0.25
D
0.50
3
JEE Main 2023 (Online) 24th January Morning Shift
+4
-1

As per given figure, a weightless pulley P is attached on a double inclined frictionless surfaces. The tension in the string (massless) will be (if g = 10 m/s$$^2$$)

A
$$\left( {4\sqrt 3 - 1} \right)N$$
B
$$\left( {4\sqrt 3 + 1} \right)N$$
C
$$4\left( {\sqrt 3 - 1} \right)N$$
D
$$4\left( {\sqrt 3 + 1} \right)N$$
4
JEE Main 2023 (Online) 24th January Morning Shift
+4
-1

Given below are two statements :

Statement I : An elevator can go up or down with uniform speed when its weight is balanced with the tension of its cable.

Statement II : Force exerted by the floor of an elevator on the foot of a person standing on it is more than his/her weight when the elevator goes down with increasing speed.

In the light of the above statements, choose the correct answer from the options given below :

A
Both Statement I and Statement II are false
B
Both Statement I and Statement II are true
C
Statement I is false but Statement II is true
D
Statement I is true but Statement II is false
EXAM MAP
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