A body weighing 5 kg is affected by a force of 80N. Find the speed of a body if it moves along a circle with a radius of 2 m.

univerkov | May 8, 2021 | education

m = 5 kg.
F = 80 N.
R = 2 m.
V -?
F = m * a – 2 Newton’s law.
Centripetal acceleration: a = V2 / R.
F = m * V2 / R
V = √ (F * R / m).
V = √ (80 N * 2 m / 5 kg) = 5.7 m / s.
Answer: the speed of the body is V = 5.7 m / s.

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