Popular Mechanics Questions

A body of superdense material with mass twice the mass of earth butsize very small compared oto the size of earth starts from rest from h<<R above the earth's surface. It reaches earth in time ...

Yesterday Philip was frustrated at the lack of gud problems...I am posting some for everyones practice..........2009 aspirants should solve them and put up solutions here for 2010 students to learn............. Some might be ...

Q1.A string of bob is attached to a block kept on frictionless surface (bob is hanging ) an impulse is imparted to bob to give it velocity v0 describe motion of block. ...

I C or Instantaneous Centre of Rotation It is a simple theory to make problems of specific type easier......... if wisely used..... It states When a body is moving on horizontal floor with pure rolling, then it is as good as ...

A uniform chain of length L and mass M is hanging vertically from its ends A and B which are close together.At a given instant the ened B is released.Find the tension at A when B has fallen a distance x(<l) *Image* ...

Q) the uniform rectangular (laminar) block in the figure has mass M and dimensions [a,a/2] which is supported by two massless inelastic strings of equal length whose other ends are attached to a rigid ceiling Find the angular ...

A uniform disc of mass m and radius r is rolling on a circle by virtue of torque Ï„ given to rod(mass M length L) pivoted to disc.Find angular accelrations of rod and disc. *Image* ...

Q1. A large open top container of negligible mass and uniform cross-sectional area A has a small hole of cross-sectional area A/100 in its side wall near the bottom. The container is kept on a smooth horizontal floor and cont ...

An engineer works at a plant out of town. A car is sent for him from the plant everyday that arrives at the railway station at the same time as the train on which he comes. One day he arrives at the station one hour before an ...

im gonna keep posting some good problems in mechanics from now on. u wudnt find these problems to be really fundu. level or or sumthing, but wud still find it conceptual enuff.some rules u have to follow while doing this will ...

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*Image* The setup shown consists of two identical rods (mass m) hinged together at the ends. This setup is held in the position shown. Now we start applying a constant force F to the free end as shown Find the initial angular ...

Q1. A small spherical ball of mass m and radius r rolls in a concave surface of radius R with sufficient friction. Find the time period of the resulting SHM. Q2. A body of mass m and specific gravity d(>1) floats in water. ...

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HC VERMA Friction 28 ...

The rod given in setup in fig1 is displaced slightly as shown in fig 2 find the time after which it will return to position in fig2 *Image* fig 1 _________________________________________________ *Image* fig 2 Take spring con ...

maine kaha there r a lot of tough problems on this site lets give u some \lim_{n\rightarrow infinity}(very)^{n} simple problems on mechanics ...

a particle is approaching with a velocity of 5i^+3j^ and it returns after colliding with a velocity of -3i^+4j^ find the coefficient of restitution ...

stat1;if the atmospheree air suddenly condenses n form a thin layer on the surface of earththe duration of day ll increase stat2;moment of inertia of earth ll increase n thus angular speed ll decrease ...

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Q1. A uniform disc of radius r is spinned about its axis to an angular velocity ω and then carefully placed with its plane on a rough horizontal surface. Find the time taken for the disc to stop rotating, given the coefficie ...

A. *Image* Then: (One or more may be correct) 1.) T = 5 N 2.) T = 10 N 3.) T' = 5 N 4.) T' = 0 B. *Image* Weight of sphere = W and a force P is applied on its surface to attain equilibrium (Friction is present). Then 1. Pmin ...

1) Is there any meaning of "Weight of the Earth"? I think it has, but it will be different for different planets and stars since they have different masses, so they'll be attracting earth towards themselves with different mag ...

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can anyone explain me how to solve problems involving variable mass systems.. except rocket propulsion... please..? ...

A man pushes a compartment of a train in the direction in which the train is accelerating uniformly. Will the man do +ve ,-ve or no work ? ...

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Is the force applied by container same in both the cases... both containing liquid of same density ρ *Image* ...

*Image* a rod is aligned at a corner as in figure. no friction is there anywhere. it start to slide. prove that it would leave the vertical wall when it's tip is at a height 1/3rd of initial. edit:: the actual question as ...

*Image* Options are: (a) 9k/m (b) 8k/m (c) k/m (d) k/2m ...