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(i) Can a body in translatory motion have angular momentum? Explain (ii) Why is it more difficult to revolve a stone by tying it to a longer string than by tying it to a shorter string? |
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Answer» Solution :Yes, a body in TRANSLATORY motion SHALL have angular momentum unless fixed point about which angular momentum is taken lies on the line of motion of body `|vecL|=rp SIN theta` =0 only where `theta=0^(@) or 180^(@)` (ii) Ml of stone `I ml^(2)(l to` length of string) l is large, `alpha` is very small `tau=I alpha` `alpha=(tau)/(I)=(tau)/(ml^(2))` If l is large a is very small `:.` more difficult to revolve. |
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