Recently Active Mechanics Questions

How to determine motion of a point when work done by it is 0 and why ??? ...

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Please help me with part b of sum no.63 Pg-137 of H.C.Verma. "A chain of length l and mass m...." ...

*Image* plz do problem 1.106 ...

*Image* a heavy ball of mass 2m moving with velocity u0 collides elastically head on with cradle of three identical balls of mass m as shown.determine velocity of each ball after collision. ...

At an instant during the motion of a particle with respect to ground , it may be at rest as well as accelerated simultaneously TRUE / FALSE Give reason ...

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figure shows a capillary tube of radius (r) dipped into water.if the atmospheric pressure is P0, then the pressure at the point A is........ *Image* ...

The homogeneous semicylinder has of mass m and centre of gravity G. Determine the largest angle θ of the inclined plane upon which it rests so that it doesnot slip down the plane. The coefficient of the static friction betwe ...

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a bicycle is moving with some accelaration on a road.the forces of friction between the road and front and the rear wheel are F1 and F2 respectively . their directions are ...

There are 2 inclines..one having friction in its upper half..other having friction in its lower half..a sphere is rolled on both of them..where will it have more energy ?? ...

A tree trunk in form of a cylinder of radius R lies on a horizontal field. A lazy grasshopper wants to jump over it. What minimum launching speed will suffice for it? Assume that the air resistance is negligible and that the ...

A disc slides down an inclined plane of 75°. The coefficient of friction is 0.2. Assume that the mass of the disc is 1kg and the radius is 50cm. Calculate the total heat produced when the disc comes down by a height of 1m. ...

*Image* answer given is b) but shouldnt it be a) becoz Fnet=Fc-W=m(2gR)/R-mg=mg ...

Q A ball hits the floor and rebounds after an inelastic collision. a)The momentum of ball just after colision is same as before collsion b)teh mech energy of ball remains conserved in teh collision c)the total momentum of bal ...

*Image* are the answer a,b,c,d ??? ...

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when released ,the mass 2m falls a distance x before the limp string becomes taut.thereafter both the mass on the left rise with the same speed.what is the final speed. *Image* i have applied impulse momentum theoram.but not ...

Two soap bubbles of radius R1 and R2 are joined by a straw.Air goes from one bubble to another and a singel bubble of radius R3 is formed.What is surface tension of soap solution if the atmospheric pressure is P0 ? ...

A sphere made of 2 non identical homogenous hemispheres stuck together is placed on an inclined plane placed inclined at angle 30 to the horz.Can the sphere remain in equilibrium on inclined plane ? ...

*Image* a block of mass m is attached as shown .at equilibrium both the springs are compressed by same length if suddenly lower spring is cut. what is the accelaration of the block just after the spring is cut ...

masses m1 and m2 both 10 kg are connected by a spring (k=100 N/m). Coeff of friction with ground is 0.04. wat is the minimum constant horizontal force to be applied on m1 to just move m2? ...

*Image* *Image* solve the pbm 1.145 or pls give hints. ...

1. *Image* the co-effnt of friction us=0.6,uk=0.4 btwn 12kg block and 3kg rod.Find the magnitude of the acceleration of the 12kg block immediately after the wire ab is cut (both the angles=30deg.) a.5 b.8 c.2.5 d.N.O.D 2. *Im ...

A body is moving in a circular motion of constant radius a)net acc of body may be towards centre of circle b)net acc of body may not be towards centre of circle c)KE=constant d)velocity must change ...

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A highly expexted good question for JEE which is made by me with a GREAT MIND. Find the tension in the thread at the last block placed at infinity. Each block is of mass m and the masses of the thread and pulleys are negligib ...

Two bars f masses m1and m2 connected by a non deformed light spring rest on a horizontal plane. The coefficient of friction between surface and the bodies is μ. What minimum constant force has to be applied in the horizontal ...