Question

If a body is in a uniform circular motion with a speed of 2 m/s having radius 1 m, then the average velocity of the body after a revolution of 1320° is

Answer 1

Answer:

a body is moving un a circular path because an external force called the centripetal force is acting on it when the firce is removed, the body carries on its journey in the direction of the velocity at the particular instant, which happen to be tangential direction because in a circular motion the linear velocity is aleays tengential to the circle in which the body is moving

Answer 2

Answer:

Given : a body is in a uniform circular motion with a speed of 2 m/s having radius 1 m,

To find :  average velocity of the body after a revolution of 1320 degrees

Solution:

Speed = 2 m/s

Radius = 1 m

Distance covered = ( 1320/360) * 2π (1)

= 23.04  m

Time = Distance/Speed

Time Taken  = 23.04/2  = 11.52  sec

1320 = 3 * 360 + 240   ( 120 deg more left to complete circle)

Displacement  = √(1² + 1² - 2(1)(1)Cos120 )

= √3

=1.732 m

average velocity  =  Displacement / Time =   1.732/11.52  =  0.15 m/s

average velocity of the body after a revolution of 1320 degrees is =  0.15 m/s.

Explanation:

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