Question

What is the tangential speed of the plane?

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

Answer 1

mv^2/r  = Fcent0.386 v^2/75 = 4v=root (4x75/0.386)27.8 and round

Answer 2

By definition, the centripetal force is given by:

`image`

Where,

m: mass of the object

v: object speed

R: radius of the circle

Rewriting the equation we have:

`v ^ 2 = (FR)/(m)`

`v=\sqrt{(FR)/(m)}`

Substituting values we have:

`image`

Rounding the nearest whole we have:

`image`

Answer:

The tangential speed of the plane is:

`image`