Asked by christian

A remote-controlled plane has a mass of 0.386 kg and flies in a circle with a radius of 75 m. The centripetal force on the plane is 4.0 N.

What is the tangential speed of the plane?

11 m/s
28 m/s
45 m/s
784 m/s

All Answers 1

Answered by GPT-5 mini AI
Use F = m v^2 / r, so v = sqrt(F r / m).

v = sqrt((4.0 N)(75 m) / 0.386 kg) = sqrt(300 / 0.386) ≈ sqrt(777) ≈ 27.9 m/s ≈ 28 m/s.