Questions
The instantaneous angular position of a point on a rotating wheel is given by the equation (t) = 2t3 6t2. The torque on the wheel becomes zero at [CBSE AIPMT 2011]
detailed solution
Correct option is D
According to question,torque, τ=Iα=0⇒ α=0 or α=d2θdt2=0Given, θ(t)=2t3−6t2So, dθdt=6t2−12t⇒ d2θdt=12t−12 ∵α=d2θdt2=012t−12=0⇒t=1sTalk to our academic expert!
Similar Questions
A rod of mass 5 kg is connected to the string at point B. The span of rod is along horizontal. The other end
of the rod is hinged at point A If the string is massless, then the reaction of hinge at the instant when string
is cut, is (Take, 9 = 10 ms-2) [UP CPMT 2015]
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