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bob whose mass is 36 kg stands at the center of a 200 kg merry-go-round that is spinning at 30 rpm. While it is rotating, Bob walks out to the edge of the merry-go-round 2m from its center. What is the spinning rate now? (The answer is 22rpm)
A roofer accidently drops a bundle of shingles. If it hits the ground with a speed of 86 m/s, how fast was it moving 3 seconds earlier (g=10 m/s/s)
LASIK eye surgery uses pulses of laser light to shave off tissue from the cornea, reshaping it, What is the power of one laser pulse
An elastic cord is 64 cm long when a weight of 56 N hangs from it and is 69 cm long when a weight of 83 N hangs from it. What is the "spring" constant of this elastic cord.
A Norwich MCE student is involved in a crucial out of class experiment. He is in his dorm room 34 feet above an historic rock wall. Describe the final result and state any assumptions that you need to make. Would the final result be any different o..
A 5.0 megawatt windmill has three 45 m-long blades that can be approximately viewed as straight rods. If the rotational speed of the rods is 6 rpm, what is the mass of each rod
A nuclear power plant generates(output) 500 MW. it is 34% efficient, How much does the water temperature rise
A certain type of laser emits light that has a frequency of 5.4 x10^14 Hz. The light, so, occurs as a series of short pulses, each lasting for a time of 2.7 x10-11 s.
Fred Jones owns 56 shares of the Robust Corporation's stock. Robust announces a 3 for 2 stock split. Explain how many shares will Fred have after this split?
what average power was developed. A curve of radius 70 m is banked for a design speed of 110 km/h. If the coefficient of static friction is 0.30 (wet pavement), at what range of speeds can a car safely make the curve.
When in deep space, the block accelerates at 4.2 m/s^2 even as a 120 N force is applied to it. The coefficient of static friction for a particular plane and this block is 0.31. What angle can this plane make with horizontal before the object starts t..
An ambulance with a siren emitting a whine at 1200 Hz overtakes and passes a cyclist pedaling a bike at 2.44 m/s, How fast is the ambulance moving
To keep a door closed, a wooden stick is wedged between the floor and the doorknob. The stick exerts at B a 45-lb force directed along line AB. Swap that force with an equivalent force-couple system at C.
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