Recently Active Mechanics Questions

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A bucket is tied to a string of mass M is lowered at a constant acceleration of g/4.If the mass of the bucket is M & is lowered by a distance d , the work done by the external agent on the string & bucket system will be ? (A) ...

a body with a kinetic enrgy K collides elasticaly with another bidy of the same mass kept at rest. find the maximum elastic potential enery of the body during the collision ans k/2 i am not abel to understand the question at ...

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Potential Energy v/s displacement curve for one dimensional conservative field is shown.Force at A & B is respectively (A) Positive , Positive (B) +ve , - ve (C) - ve, +ve (D) - ve. - ve *Image* Plz use MAGNIFIER if img is no ...

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*Image* A particle is placed on a rough plane inclined at an angle α to the horizontal. It is initially in limiting static equilibrium. It is given an initial velocity V0 along the x-axis. What is the limiting speed reached ...

A. Acceleration of particle is zero B. Acceleration of particle is uniform C. Acceleration of particle is non-uniform D. Acceleration of particle is directly proportional to t *Image* 1 . V vs X 2. V2 vs X 3.X vs T 4.V vs T ...

Q1 *Image* i dont have the answer with me...so please post the solution... ...

A hemispherical bowl of radius R is rotated about its axis of symmetry which is kept vertical. A small block is kept at a position where the radius makes an angle ∂ with the vertical. The block rotates with the bowl without ...

Two equal spheres of mass m' are suspended by vertical strings so that they are in contact with their centres at same level. a third equal sphere of mass m falls vertically and strikes elastically the other 2 simultaneously s ...

Imagine a two wheeled robot as shown in the figure here. The robot has two DC motors with rated speed of 60 rpm. The distance between the two wheels is around 20 cm. What should be the operating speeds of both the motors (out ...

this is a question i found on a website In the image shown here, the rod is coupled to the shaft of a low torque DC motor. Owing to the weight of the rod, the shaft tends to rotate and hence cannot hold the rod at a particula ...

the equation du=-F.dr is it also valid for conservative external forces ...

If the set up shown below is on "MARS", what will be the torque at point A? Ignore the weight of the beams AB and BC. *Image* ...

What's the COM of a circular segment like this one??? *Image* ...

something must be wrong in my concepts:i still cant figure out this q. Help!! An insect of mass m is initially at rest at one end of a stick of length L and mass M , which rests on a smooth horizontal floor . The coefficient ...

A simple pendulum is oscillating with a time period T. The bob is metallic and has a charge +q. Choose the correct statement(s) 1. T will increase if a uniform electric field is applied in vertically upward direction 2. T wil ...

*Image* block m rests onwedge.(a)wat horizontal acc. a must M have relative tothe table to keep m staionary realtive to the wedge assuming frictionless contacts.(b)wat force F must be applied to the system to achieve this res ...

In uniform circular motion, the acceleration is non uniform. ...

what will be the shape of the graph when velcoity is plotted against distance could anyone tell me how to solve these types of graph sums forgot to add the motion is shm ...

*Image* A plank of mass 4 kg is placed on a smooth horizontal surface. A block of mass 2 kg is placed on the plank and is being acted upon a horizontal force F=0.5t , where F is in Newton and t is in s. if the coefficient of ...

Two similar balls are connected by a string of length 2l and are placed at a separation l on smooth horizontal table. one of the balls is given a velocity v0 shown in the figure . What are velocities of the balls when the str ...

Ques1) Calculate the change in the value of g at altitude 45 defree. Take radius of earth = 6370 km. Ques2) Determine the speed with which the earth would have to rotate on it's axis , so that a person on the equator would we ...

A bullet loses 1/20 th of its velocity on passing through a plank. Assuming the planks exert a constant retarding force, what is the no. of such planks required to just stop the bullet? Options given, but I'd rather someone s ...

*Image* A short semicircular right cylinder of radius r and weight W rest on a horizontal surface and is pulled at right angle to its geometric axis by a horizontal force F applied at the middle Q of the front edge.Find out t ...

A Qn is....... Two air bubbles in water --- (a)attract each other (b)repel each other (c) do not exert ny force on each other (d)may attract or repel; depends on the distance between them. The explaination fr the ans (a) goes ...

find the frctional acting on the mass 4kg the options are 24n,8n,18n,10n see... my bro whoos in fiitjee is telling me that opn the block of mass 2kg the frictional force 8n will act so tension will be 2n ... and i solve it bu ...

A stick of length L and mass M lies on a frictionless horizontal surface on which it is free to move in anyway. A ball of mass m moving with speed v collides elastically with the stick at a distance d below its centre. What m ...

*Image* A particle B of mass 0.6 kgslides down the smooth face of a wedge A of mass 1.7 kg, which can move freely on a smooth horizontal surface. Inclination of the face to the horizontal is 45° . Then : a) acceleration of A ...