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A simple inclined plane
Join a spring balance to a toy car or roller skate and pull it up a slanting board (inclined plane). Note the force needed to move the car and compare it with the force required to lift it vertically. Note also that in moving up the inclined plane, the force is exerted over a greater distance than when the car is lifted vertically to the similar height above the table. Neglecting friction, the work needed is the similar in both cases. Point out that this is also true for other easy machines.
simple inclined plane
Frequency:- The number of vibration done per second by an oscillation body is known its frequency. It is denoted by V. The S.I unit is Hz.
In the figure below the closed surfaces A and B appear as closed curves. Find the flux through closed surface B.
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Q What is photoelectric effect? Photoelectric release is the phenomena by which a good number of substances chiefly metals emit electrons under the influence of radiation such
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