Question

Calculate the speed of an object rotating on a circular path of diameter 14 m if it completes one rotation in 4 seconds.​

Answer 1

Answer:

11 m/s

Explanation:

The diameter = 14m ; So the radius = 14/2m = 7m

Circumference = 2 pie r = 43.98 m (approx 44m)

Speed = distance/time = 44m/4sec = 11m/s

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Answer 2

Answer:

1 minutes=60 seconds

60÷4=15

So,its speed per minute is 14m×15=160 mins

1 hour=60 minutes

160×60(minutes)= 9600 m= 9 km 600m

●The speed of the object is 9km600m/hour.