A stone whirled at the end of a rope 30cm long,makes 5 complete revolutions in 25secs.Find 1.Angular velocity in rad/sec 2.The linear velocity 3.Distance covered in 4secs?

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Answer 1 · 2018-03-24T13:28:05

See the explanation below

The radius is #r=0.3m#

#1" revolution "= (2*pi )rad#

The angular velocity is

#omega=(5*2pi)/(25)=1.26rads^-1#

The linear velocity is

#v=omegar=1.26*0.3=0.38ms^_1#

The angle covered in #4s# is

#theta=4*1.26=5.03rad#

The distance is

#d=rtheta=0.3*5.03=1.51m#