Solving Problems In Mechanics

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Block Pulled by Rope of Some Mass

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Solving Problems in Mechanics

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Important Questions

Three blocks A, B and C, of masses and respectively, are in contact on a frictionless surface, as shown. If a force of is applied on the block, then the contact force between A and B is:

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Three blocks with masses m, 2m and 3m are connected by strings, as shown in the figure. After an upward force F is applied on block m, the masses move upward at constant speed v. What is the net force on the block of mass 2m?
(g is the acceleration due to gravity)

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Two masses and are connected at the two ends of a light inextensible string that goes over a frictionless pulley. Find the acceleration of the masses, and the tension in the string when the masses are released.

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A string of negligible mass going over a clamped pulley of mass supports a block of mass as shown in the figure. The force on the pulley by the clamp is given by:

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Two blocks and of masses and respectively are connected by a massless and inextensible string. The whole system is suspended by a massless spring as shown in figure. The magnitudes of acceleration of and immediately after the string is cut, are respectively :

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Three blocks are connected as shown in the figure, on a horizontal frictionless table and pulled to the right with a force of . if , and then the value of :

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A force of acts on a body of mass for , initially at rest. Calculate:
(i) the velocity acquired by a body
(ii) change in momentum of the body

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The system is pushed by a force as shown in fig. All surfaces are smooth except between and Friction coefficient between and is Minimum value of to prevent block from down ward slipping is:

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A body of weight is suspended as shown in the figure The tension in the horizontal string (in kg wt) is 

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The given figure shows three blocks in contact and kept on a smooth horizontal surface. What is the ratio of force exerted by block A on B to that of B on C?

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