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प्रश्न
A solid sphere, a hollow sphere and a disc, all having same mass and radius, are placed at the top of a smooth incline and released. Least time will be taken in reaching the bottom by _________ .
विकल्प
the solid sphere
the hollow sphere
the disc
all will take same time
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उत्तर
all will take same time
The incline is smooth; therefore, all bodies will slip on the incline. Also, as the mass of bodies is same, they will reach the bottom in equal time.
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