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A mass m = 17.0 kg rests on a frictionless table and accelerated by a spring with spring constant k = 4047.0 N/m. The floor is frictionless except for a rough patch. For this rough path, the coefficient of friction is ?k = 0.42. The mass leaves the spring at a speed v = 2.9 m/s.1) The mass is measured to leave the rough spot with a final speed vf =1.2 m/s2) What is the length of the rough spot?3) In a new scenario, the block only makes it half-way through the rough spot. How far was the spring compressed from its unstrectched length?4) In this new scenario, what would the coefficient of friction of the rough patch need to be changed to in order for the block to just barely make it through the rough patch?
An ultralight plane and pilot have a total mass of 150 kg. what is the net force acting on the plane and pilot
At a carnival, you can try to ring a bell by striking a target with a 10.3-kg hammer. How fast must the hammer be moving when it strikes the target so that the bell just barely rings
Two converging lenses are placed 88.0 cm apart. An object is placed 1.100 m to the left of the first lens, which has a focal length of 27.0 cm. What is the focal length of the second lens
On a warm summer day (29?C), it takes 4.50s for an echo to return from a cliff across a lake. What is the temperature on the winter day
A previous nuclear accident occurred where a worker received 100J/Kg of gamma radiation. Estimate the dose in rem of the worker
A copper rod and an aluminum rod of equal diameter are joined end to end in good thermal contact. what must be the length of the aluminum rod so that the temperature at the junction is 50°C
If the ropes supporting the rings are attached to ceiling directly above, what is the tension in each rope.
A tank with vertical walls, 2m wide and 2m long and 2.5 m high, is filled with 4800 litres of water (density 1000 kg/m3) and 3200 litres of light oil (density 900 kg/m3). compute the magnitude and location of the resultant force on each of the ver..
Assume you weigh 160 lbs on earth. How far away from earth's surface would you have to go so that your weight dropped to 40 lbs
TV-reception antennas for VHF (channels 2 through 13) are constructed with cross wires supported at their centers, What is the frequency for channel 4
A small button placed on a horizontal rotating platform with diameter 0.328 will revolve with the platform, How far from the axis can the button be placed, without slipping, if the platform rotates at 62.0
The atomic number of lead is 82. The alpha particle is a helium nucleus, with atomic number 2.
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