A 0.88 kg mass attached to the end of a string swings in a vertical circle (radi

Question

A 0.88 kg mass attached to the end of a string swings in a vertical circle (radius = 4.0 m). When the string is horizontal, the speed of the mass is 9.7 m/s. What is the magnitude pf the force of the string on the mass at this position? 91 N 21 N 22 N 12 N 29 N A hornet circles around a pop can at constant speed once per second in a path with a 14-cm diameter. We can conclude that the hornet's wings must push on the air with force components that are___. straight down down, inwards and backwards down and outwards down and backwards down and inwards

Explanation / Answer

11 )

given

m = 0.88 kg

r = 4 m

v = 9.7 m/s

the magnitude of the force of the string is

using the equation for centripetal or centrifugal force

F = m v2 / r

F = 0.88 X 9.72 / 4

F = 82.7992 / 45

F = 20.6998 N

F = 21 N ( rounded off value )

Option " b " is correct

12 )

Option : " C " is correct

that is DOWN AND OUTWARDS

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