Question

.. A particle is moving along a circular path of radius 20 cm. In time 0.2 s it makes an angle of 60° at the
center. The avg. speed and avg. velocity are respectively ​

Answer 1

Explanation:

Change in velocity of a particle in circle in given by,

∣Δ

v

ˉ

∣=

v

1

2

+v

2

2

+2v

1

v

2

cos(π−θ)

Since [∣

v

1

ˉ

∣=∣

v

2

ˉ

∣]=v

∣Δ

v

ˉ

∣=2vsin

2

θ

On putting the values of vandθ

=(2×10)×sin(30

o

)

=10m/s

Hence the change in velocity is 10m/s

solution

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