I just want to check if my answers for these are right so far.(adsbygoogle = window.adsbygoogle || []).push({});

"Consider a ball of mass M and radius R being bowled in a bowling alley. The ball is released with velocity v0. As it makes contact with the wooden floor (of coefficient of friction, μ), the ball slows down and begins to rotate. It is both sliding and rotating."

Write down expressions for:

i. the linear deceleration

Frictional force, F = -μN = -μMg

N II: -uMg = Ma

=> a = -μg

ii. the angular acceleration

Not sure here

α = a/R, but a is -ve, which would mean α is negative :/

iii. the speed of the centre of the ball after time t

v = u + at

v = v0 - μgt

Not quite sure about this one either, cos it's worth 2 marks :/

Thanks.

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# Homework Help: Classical mechanics questions

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