Each blade on a rotating airplane propeller is like a long, thin rod. If each blade were stretched to double its length (while the mass of each blade and the propeller’s angular speed stay the same), by what factor would the kinetic energy of the rotating blades increase? (i) 2; (ii) 4; (iii) 8; (iv) the kinetic energy would not change; (v) the kinetic energy would decrease, not increase.

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Q: Energy Example A box of mass 15 kg is released from rest on an inclined surface with a restraining…

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Q: What will the speed of the mass be when it has moved a total distance of 1.0 m up the incline from…

A: For solution refer below images.

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A: Givendraw diagram

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A: Write the given data. Weight of drill, Wd=3.1 kg×9.81=30.411 NWeight of arm, Warm=17 lbs=75.62…

Q: ii) A piston travels between two stops and is restrained by a linear spring as shown. The…

A: GivenA=0.05m2V1=0.01m3V3=0.03m3k=30.0 kN/m3P1=0.5MPa=500 kPaP2=1MPa=1000kPaP3=2MPa=2000kPa

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Q: Standalone problem with no figure. A motor lifts a 500 kg mass a distance of 20 m in 30 seconds. The…

A: Given values, m=500kg, h=20m t=30 sec, η=0.7 we know, g=9.81 m/s2

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Q: A small civilian aircraft gasoline engine in an airplane, operating at 2.55 x 103 rev/min, takes in…

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Forms of Energy

Energy is described as the capability to accomplish a task, like the ability to push a block by applying force on it. It is a quantitative property that is used to accomplish work on an object.