A spherical ball of mass 20 kg is stationary

Asked by admin @ 17/08/2021 in Physics viewed by 305 People

A spherical ball of mass 20kg is stationary at the top of a hill of height 100m.It rolls down a smooth surface to the ground and then climbs up another hill of height 30m and finally rolls down to a horizontal base at a height of 20m above the ground.The velocity attained by the ball is

Answered by admin @ 17/08/2021

First we will find its Ep.

We know,
Ep= mgh.
So, mgh 's formula is...
mgh = 1/2 mv ²
Hence, u = √ 2gh
Here u =√ 2 × 10 × 80
So right answer will be -- 40 ms ^-1

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Asked by admin @ 17/08/2021 in Physics viewed by 387 persons

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Asked by admin @ 17/08/2021 in Physics viewed by 345 persons

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Asked by maham237 @ 28/11/2020 in Chemistry viewed by 467 persons

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Asked by admin @ 20/08/2021 in Physics viewed by 307 persons

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Asked by maham237 @ 25/12/2020 in Physics viewed by 360 persons

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A block of mass 10 kg moving with acceleration

Asked by admin @ 23/08/2021 in Physics viewed by 465 persons

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Asked by admin @ 23/08/2021 in Physics viewed by 319 persons

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Asked by admin @ 23/08/2021 in Physics viewed by 338 persons

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