A flywheel making 120 r-p-m is acted upon by a retarding torque producing angular retardation of pi rad-s-2- Time taken by it to come to rest is-1 s2 s4 s3 s

Question

A flywheel making 120 r-p-m is acted upon by a retarding torque producing angular retardation of pi  rad-s-2- Time taken by it to come to rest is-1 s2 s4 s3 s

Toppr Admin · Accepted Answer

T-I-x3B1-x3C9-120-xD7-2-x3C0-60-x3C9-4-x3C0-x3C9-x3C9-0-x3B1-t0-4-x3C0-x2212-x3C0-tt-4s

A flywheel making $120$ r.p.m is acted upon by a retarding torque producing angular retardation of $π r a d / s^{2}$ . Time taken by it to come to rest is:
$1$ s
$2$ s
$4$ s
$3$ s

$T = I α$
$ω = \frac{120 \times 2 π}{60}$
$ω = 4 π$
$ω = ω_{0} + α t$
$0 = 4 π - π t$
$t = 4 s$

A flywheel making 120 r.p.m is acted upon by a retarding torque producing angular retardation of π rad/s2. Time taken by it to come to rest is:1 s2 s4 s3 s

T=Iαω=120×2π60ω=4πω=ω0+αt0=4π−πtt=4s

A flywheel making $120$ r.p.m is acted upon by a retarding torque producing angular retardation of $π r a d / s^{2}$ . Time taken by it to come to rest is:
$1$ s
$2$ s
$4$ s
$3$ s

$T = I α$
$ω = \frac{120 \times 2 π}{60}$
$ω = 4 π$
$ω = ω_{0} + α t$
$0 = 4 π - π t$
$t = 4 s$