Recently Active Mechanics Questions

a uniform circular disc of radius R is placed on a frictionless horizontal plane .another identical disc rotating with angular velocity \omega _{0} is gently placed on the top of the first disc .calculate the time in which bo ...

the distance from the surface of earth at which the gravitational potential energy of a ball of mass m is half at of that at the centre of earth is radius-R ...

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Find the accleration of block of mass M' with repect to the wedge of mass M,assuming all surfaces to be frictionless. *Image* ...

*Image* a ring rolls without slipping on a horizontal surface .at any instant ,its position is as shown in figure a) section ABC has greater kinetic energy than section ADC b) section BC has greater kinetic energy than sectio ...

Two blocks A and B of mass Ma and Mb are connected together by a spring and are resting on a horizontal frictionless table.Thr block are then pulled apart so as to stretch the spring and then released.Show that the kinetic en ...

A boy of mass 60 kg is standing over a platform of mass 40 kg placed over a smooth horizontal surface.He throws a stone of mass 1kg with velocity v=10m/s at an angle of 45° wrt ground .Find the displacement of the platform(w ...

A plank of mass 2 kg and length 1m is placed on a horizontal floor. A small blockk of mass 1 kg is placed on the top of the plank, at it's right extreme end. The coeff of friction b/w the plank and the floor is 0.5 and that b ...

Three particles of mass 20g,30g and 40g are moving along the positive direction of the coordinaate axes respectively with the same velocity of 20cm/s,when due to their mutual interaction,the first particle comes to rest,the s ...

A particle of mass 2m is projected at an angle of 45 wrt horizontal wid a velocity of 20 2 m /s .After 1 s explosion takes place and the particle is pbroken into two equal pieces .As a result of this one part comes to rest.Fi ...

Q-1 : A bodu weighs 8 gm when placed in one pan and 18 when placed on a other pan of a false balance . If the beam is horizontal when both the pans are empty , the true weight of the body is Q-2 : when one swims across a rive ...

what is the concept of instanteneous axis of rotation? how to use this concept in problems? ...

System shown in figure is in equilibrium. Find the magnitude of net change in the string tension between the 2 masses just after, when one of the springs is cut. Mass of both the blocks is same and equal to m and spring const ...

one end of a light spring of natural length d & spring constant k(=mg/d) is fixed on a rigid support& the other end is fixed to a smooth ring of mass m which can slide without friction on a vertical rod fixed at a distance d ...

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IN THE QUESTION GIVEN BELOWWWWWWWWWWW are we supposed to neglect earth's mass??????? *Image* ...

*Image* Find the velocity of all the four spheres when the centre of the upper sphere is n x d distance from the ground ???? ...

*Image* a frictionless nd a massless pulley shown in the fig. the blocks are realeased from rest. after 1sec from the start , the block of mass 4kg is stopped momenterily. find the time which string becomes the tight again ...

Mr X of mass 80 kg enters a lift and selects the floor he wants. The lift now acc upward at 2 m/s2 for 2 sec and then moves with const velocity. As a lift approaches his floor, it decelerates at the same rateas it is previous ...

Dis is a real emergency(simple one though).....plz helpp.... when a gas filled balloon rises up, it gains both kinetic energy and potential energy.....how does the principle of conservation of energy apply in this case??Expla ...

TWO CARS A AND B ARE TRAVELLING IN THE SAME DIRECTION WITH VELOCITIES V1 AND V2 ( V1 > V2 ) WHEN THE CAR A IS AT A DISTANCE AHEAD OF THE CAR CAR B . THE DRIVER OF THE CAR A APPLIED THE BREAKSPRODUCING A UNIFORM RETARDATIO ...

*Image* A particle B of mass 0.6 kg slides down the smooth face PR of wedge A of mass 1.7 kg, which can move freely on a smooth horizontal surface.Show that:- (a) the acc of A is 3g/20 (b) the vertical component of the acc of ...

A horizontal force F=mg/3 is applied on the upper surface of a uniform cube of mass m and side a which is resting on a rough horizontal surface having co-eff. of friction = 1/2. The distance between the lines of action of mg ...

*Image* The velocity time graph of the figure shows the motion of a block of mass 1 kg which is given an initial push at t=0 along a horizontal table Show that (a) The coeff of friction b/w the block and the table is 0.1 (b) ...

*Image* the spherical cavity is at distance a from the centerfield of solid sphere ..the gravitational field .inside the cavity is....... ...

*Image* Ques1) In the above figure, a smooth block loosely fits in a circular tube placed on a horizontal surface. The block moves in an uniform circular motion along the tube. Which wall (inner or outer) will exert a non zer ...

*Image* Q1 Find the magnitude of velocity of piston as a function of time (if at t=0, points O,A,B were in straight line ) Q2 What type of motion is of point A on the flywheel ? Q3 Find magnitude of angular velocity of rod as ...

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Q1. A cylindrical container of an incompressible liquid with density ρ rotates with constant angular speed ω about its axis of symmetry, which we take to be the y-axis. (a) Show that the pressure at a given height within th ...

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