Question

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Answer 1

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Given : r=12 cm=0.12 m

Time to complete one revolution t=100 s

Average speed V avg = 2π r/T = 2π×0.12/100

=0.0075 m/s=0.75 cm/s

Angular speed w= v/r = 0.0075/0.12

=0.0625 rad/s

Centripetal acceleration changes its direction at every instant.

Magnitude of acceleration a= r/v ^2

=4.7×10 ^−4

m/s ^2

=0.047 cm/s^2

Answer 2

Answer:

Given : r=12 cm=0.12 m

Time to complete one revolution t=100 s

Average speed V avg = 2π r/T = 2π×0.12/100

=0.0075 m/s=0.75 cm/s

Angular speed w= v/r = 0.0075/0.12

=0.0625 rad/s

Centripetal acceleration changes its direction at every instant.

Magnitude of acceleration a= r/v ^2

=4.7×10 ^−4

m/s ^2

=0.047 cm/s^2