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A simple wheel and axle
Remove the cover from a pencil sharpener and bind a string tightly around the end of the shaft. Bind a weight of various kilograms to the end of the string and turn the handle. Note that the force required to turn the handle is much less than the force of gravity on the weight. Point out that the pencil sharpener is used as a wheel and axle in this demonstration.
At what angle should a body be projected with a given velocity 24m/s just to pass over the obstacle 14m high at a given distance of 24m. Solution: 14=24xtan(θ)-(g*)(24 2
Simple 'spring' balance Punch four holes in an old tin lid with a nail, spacing them partially round the circumference. Pass pieces of string by these holes and tie them togeth
To free a charged a particle freely in air under the persuade of electric field its downward weight should be balanced by upward electric force for instance if a positive charge is
Potential free contacts (also known as "dry contacts") are simply contacts which are physically operated with the main device, but not electrically connected to it. For example a m
Thermonuclear reactions: The fusion reactions which require extremely high temperatures are called thermonuclear reactions. The most important thermonuclear reactions take plac
Electrostatics – Two kinds of Charges Introduction: If a glass rod is rubbed with silk cloth it acquires a positive charge, while silk cloth acquires an equal amo
The tree needs to fall uphill even though it is leaning downhill. The felling notch at O is sufficiently large so that the resisting moment at O is negligible. The trunk above po
what are the characterstics of laser?
Indicate all that is incorrect about the statement The magnetic field lines of a stationary bar magnet move from the north pole of the bar magnet to the south pole of the bar magne
Ask question #Minimum 100 wora cannon of mass 5m ( including a shell of mass m )is at rest on a smooth horizontal ground fires the shell with its barrel at an angle A with the hori
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