Physics-
General
Easy
Question
A thin rod of mass M and length L is struck at one end by a ball of clay of mass m, moving with speed v as shown in figure. The ball sticks to the rod. After the collision, the angular momentum of the clay-rod system about A, the midpoint of the rod, is
- MvL
The correct answer is:
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One ice skater of mass m moves with speed 2v to the right, while another of the same mass m moves with speed v toward the left, as shown in figure I. Their paths are separated by a distance b. At t = 0, when they are both at x = 0, they grasp a pole of length b and negligible mass. For t > 0, consider the system as a rigid body of two masses m separated by distance b, as shown in figure II. Which of the following is the correct formula for the motion after t = 0 of the skater initially at y = b/2?
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A cylinder having radius 0.4 m, initially rotating (at t = 0) with 
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A and B are
A and B are
chemistry-General
chemistry-
and enantiomer. 2-butene is
and enantiomer. 2-butene is
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Which is true statement?
Which is true statement?
chemistry-General
chemistry-
Which is true about this reaction?
Which is true about this reaction?
chemistry-General
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Stability of
I) 
II) 
III) 
IV) 
In the increasing order is
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I)
II)
III)
IV) In the increasing order is
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A smooth rod of length l is kept inside a trolley at an angle as shown in the figure. What should be the acceleration a of the trolley so that the rod remains in equilibrium with respect to it?
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physics-General
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AB and CD are two identical rods each of length L and mass M joined to form a cross. Find the M.I. of the system about a bisector of the angle between the rods (XY)
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physics-General
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A uniform rod of mass m is bent into the form of a semicircle of radius R. The moment of inertia of the rod about an axis passing through A and perpendicular to the plane of the paper is
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An inverted “V” is made up of two uniform boards each weighing 200 N. Each side has the same length and makes an angle with the vertical as shown in figure. The magnitude of the static frictional force that acts on each of the lower end of the V is
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physics-General
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In the figure shown a long cart moves on a smooth horizontal surface due to an external constant force of magnitude F. Initial mass of the cart is M0 and velocity is zero. At t = 0 sand starts falling from a stationary hopper on to the cart with negligible velocity at constant rate kg/s and sticks to the cart The velocity of the cart at time t(<t0)
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A bob of mass 10 M is suspended through an inextensible string of length l When the bob is at rest at the equilibrium position, two particles of mass m each moving with velocity u making an angle 
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A bob of mass 10 M is suspended through an inextensible string of length l When the bob is at rest at the equilibrium position, two particles of mass m each moving with velocity u making an angle with the string strike and get simultaneously attached to the bob What is the value of impulsive tension (l) in the string during the impact ?
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A small ball is dropped from a height h onto a rigid frictionless plate at B and rebounds. Find the maximum height reached after rebound if the coefficient of restitution between the ball and the plate is e = 0.75:
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physics-General
