What is the tangential speed of the plane? A remotecontrolled plane has a mass of 0.386 kg and flies in a circle with a radius of 75 m. The centripetal force o
Physics
2017lhsg
Question
What is the tangential speed of the plane?
A remotecontrolled 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
A remotecontrolled 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
2 Answer

1. User Answers osprey2015
mv^2/r = Fcent0.386 v^2/75 = 4v=root (4x75/0.386)27.8 and round 
2. User Answers carlosego
By definition, the centripetal force is given by:
[tex] F = m * (\frac{v ^ 2}{R})
[/tex]Where,
m: mass of the object
v: object speed
R: radius of the circle
Rewriting the equation we have:
[tex] v ^ 2 = \frac{FR}{m} [/tex]
[tex]v=\sqrt{\frac{FR}{m}}[/tex]
Substituting values we have:
[tex] v =\sqrt{\frac{4 * 75}{0.386}}
v = 27.9
[/tex]Rounding the nearest whole we have:
[tex] v = 28 \frac{m}{s}
[/tex]Answer:
The tangential speed of the plane is:
[tex] v = 28 \frac{m}{s}
[/tex]