IIT-JEE 2005 Mains | Rotational Motion Question 70 | Physics

IIT-JEE 2005 Mains

MCQ (Single Correct Answer)

-1

Two identical ladders, each of mass M and length L are resting on the rough horizontal surface as shown in the figure. A block of mass $$m$$ hangs from P. If the system is in equilibrium, find the magnitude and the direction of frictional force at A and B.

IIT-JEE 2005 Mains Physics - Rotational Motion Question 17 English

$$f=\left[\frac{\mathbf{M}+m}{2}\right] g \cot \theta$$

$$f=\left[\frac{\mathbf{M}+m}{3}\right] g \cot \theta$$

$$f=\left[\frac{\mathbf{M}+m}{2}\right] 5g \cot \theta$$

$$f=\left[\frac{\mathbf{M}+m}{4}\right] g \cot \theta$$

IIT-JEE 2001

MCQ (Single Correct Answer)

-1

One quarter section is cut from a uniform circular disc of radius $R$. This section has a mass $M$. It is made to rotate about a line perpendicular to its plane and passing through the centre of the original disc. Its moment of inertia about the axis of rotation is

IIT-JEE 2001 Physics - Rotational Motion Question 9 English

$\dfrac{1}{2} MR^2$

$\dfrac{1}{4} MR^2$

$\dfrac{1}{8} MR^2$

$\sqrt{2} MR^2$

IIT-JEE 2000

MCQ (Single Correct Answer)

-1

A thin wire of length $L$ and uniform linear mass density $\rho$ is bent into a circular loop with centre at $O$ as shown. The moment of inertia of the loop about the axis $XX'$ is:

IIT-JEE 2000 Physics - Rotational Motion Question 10 English

$\frac{\rho L^3}{8\pi^2}$

$\frac{\rho L^3}{16\pi^2}$

$\frac{5\rho L^3}{16\pi^2}$

$\frac{3\rho L^3}{8\pi^2}$

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