Sparks that are produced during the sharpening of knife against a grinding wheel leave the rim of wheel tangentially. Why? Explain with respect to inertia.
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The sparks produced during sharpening of a knife against a grinding wheel - they leave tangentially at the rim of the wheel. It can be attributed to the phenomenon of Inertia - of 1st law of motion of Newton. When sharpening is done, very tiny pieces on the surface of the grinding wheel get broken from the wheel.
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