1.

A small body of mass 0.1 kg isundergoing S.H.M. of amplitude 1 metre and period 0.2 s. The maximum force acting on it is nearly :

Answer»

99 N
9.9 N
0.99 N
990 N

Solution :`a_("max")=omega^(2)r=(4pi^(2))/(T^(2)).r`
`:. F_("max")=ma_("max")=(4pi^(2)mr)/(T^(2))=(4pi^(2)xx0.1xx1)/((0.2)^(2))`
= 99 N approx.
THUS correct choice is (a).


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