Mechanics> a wheel rotating at an angular speed of 2...

a wheel rotating at an angular speed of 20rad/s,is brought to rest by a constant torque in 4sec.if M.I is 0.2kg metre square,work done in first 2 sec is??

Anirudh Kolavennu , 10 Years ago

Grade 12

1 Answers

subrata dutta

Last Activity: 10 Years ago

torque(T)= M.I.× angular acc.(a_r), a_r=20/4 =5 rad/s², so T=0.2×5=1 Nm, again angular diplacement(∂) in 2 sec = w₀t-0.5a_rt², = 30 rad, so work done in 1^st 2 sec= T×∂= 1×30=30j

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Mechanics> a wheel rotating at an angular speed of 2...

a wheel rotating at an angular speed of 20rad/s,is brought to rest by a constant torque in 4sec.if M.I is 0.2kg metre square,work done in first 2 sec is??

Anirudh Kolavennu , 10 Years ago

subrata dutta

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