Problem-2 A model of a helicopter rotor has four blades, each 3.40 m long from the central shaft to the blade trip. The model is rotated in a wind tunnel at 550 rev/min. (a) What is the linear speed of the blade tip, in m/s? (b) What is the radial acceleration of the blade tip expressed as a multiple of the acceleration of gravity, g?

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Problem-2
A model of a helicopter rotor has four blades, each 3.40 m long from the central shaft to the
blade trip. The model is rotated in a wind tunnel at 550 rev/min. (a) What is the linear speed of
the blade tip, in m/s? (b) What is the radial acceleration of the blade tip expressed as a multiple
of the acceleration of gravity, g?
Problem-3
A 68.5 kg skater moving initially at 2.40 m/s on rough horizontal ice comes to rest uniformly in
3.52s due to friction from the ice. What force does friction exert on the skater?
Transcribed Image Text:Problem-2 A model of a helicopter rotor has four blades, each 3.40 m long from the central shaft to the blade trip. The model is rotated in a wind tunnel at 550 rev/min. (a) What is the linear speed of the blade tip, in m/s? (b) What is the radial acceleration of the blade tip expressed as a multiple of the acceleration of gravity, g? Problem-3 A 68.5 kg skater moving initially at 2.40 m/s on rough horizontal ice comes to rest uniformly in 3.52s due to friction from the ice. What force does friction exert on the skater?
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