Question

a student ties a stone to a thread of length 1 m and start swinging in a circular motion. the stone completes 20 rotations in 10 seconds. with what speed the stone is moving?
a) πm/sec
b) 2πm/sec
c) 4πm/sec
d) 8πm/sec​

Answer 1

Answer:

look at the above attachment.

Number of rotations = 20. Time for completing 20 rotations = 10 seconds.

Step-by-step explanation:

Although the speed is constant but the velocity is not constant. The stone experience a radial force which keeps on changing the direction of motion of stone without changing its speed. But there is a change in velocity, Therefore it is called an accelerated motion.

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Answer 2

Answer:

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. Radius of the circular path = 1 m. Distance covered by the stone = ? Number of rotations = 20. Time for completing 20 rotations = 10 seconds.