Recently Active Mechanics Questions

A train is moving along a straight line with a constant acceleration a. A boy standing in the train throws a ball forward at an angle of 60° to the horizontal. The boy has to move forward by 1.15m inside the train to catch t ...

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Is it ever possible that a body moving down an inclined plane acquires so much velocity that it moves higher when it is ascending the other plane? Like in the top picture, can it rise higher than from where it was rolled on t ...

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A drop with initial mass M falls under the action of the force of gravity and evaporates uniformly losing a mass m each second.What is the work performed by the force of gravity during the time interval from the start to the ...

Newton's 3rd law states that to every action there is an equal and opposite reaction on two different bodies.... But, A ball has mass m. it goes and hits a wall with f=ma. let this force be f1. now change the frame of referen ...

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A container (both side open is kept inverted as shown in the figure. Dimensions are given in the picture itself. The container is completely filled with a liquid. Find the minimum mass of the container so that it can stay on ...

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An open-ended U-tube of uniform cross-sectional area contains water (density 1.0 gram/centimeter3) standing initially 20 centimeters from the bottom in each arm. An immiscible liquid of density 4.0 grams/centimeter3 is added ...

A U-tube of uniform cross-section is partially filled with a liquid-I. Another liquid-II which does not mix with liquid-I is poured into one side. It is found that the liquid levels of the two sides of the tube are same, whil ...

A block of iron is kept at the bottom of a bucket full of water at 2 degree centigrade.THE water exerts buoyant force on the block.If temp of water is increased by 1 degree centigrade ,the temp of iron block also increases by ...

A stone is tied to a string of length l and whirled in a circular path.The speed of the stone at the lowest point is u.Find the magnitude of change in velocity when the string is horizontal? let velocity when string is horizo ...

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A collar of negligible size slides over the surface of horizontal circular rod for which coefficient of friction is 0.3.The collar is projected with a speed of 4 m/s and the radius of the ring is 10 cm.Find the distance moved ...

Before Einstein, it was known that a beam of light pushes against matter, this is known as radiation pressure. This means the light has momentum. *Image* Consider a cylinder of mass M.A pulse of light with energy E is emitted ...

4 thin rods of length L and mass M are joined together to make a square. Find the moment of inertia of the system about any side. My approach:- I am finding the MI about the left side. The MI of the top and bottom rods(each) ...

m grams of a gas of molecular weight M is flowing in an insulated tube with velocity v.If the system is suddenly stopped then find the rise in temperature. ...

Three charged balls A B C are thrown at the same time from the top of a very high building with velocities mentioned. vA=3j-3i vB=3j vC=6j+2i All the balls are of same mass.Horizontal is X direction and vertically up is Y dir ...

Two particles are projected from the ground,one vertically upwards and one 60 deg above the horizontal.What will be the separation between them after t seconds? ...