A body of mass 4 kg is moving in a circle of radius 10 cm with a constant speed of 20 cm/sec.Calculate the work done in moving the body over half the circumference of the circle.?
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Hello Mate!
Since we know that in a circular motion, the tangent or the direction of motion is perpendicular to that of circum center so angle is 90°.
Work done = F s cos theta
Force = mass × acceleration
Work Done = 4 kg × a × 0.1 m × cos 90°
Work done = 0.4a × 0
[ Because cos 90° = 0 ]
Work done = 0 J
Have great future ahead!
Since we know that in a circular motion, the tangent or the direction of motion is perpendicular to that of circum center so angle is 90°.
Work done = F s cos theta
Force = mass × acceleration
Work Done = 4 kg × a × 0.1 m × cos 90°
Work done = 0.4a × 0
[ Because cos 90° = 0 ]
Work done = 0 J
Have great future ahead!
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