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Question: A 60kg skier with an initial speed of 12 m/s coasts up a 2.5 m high rise that makes an angle of 35o with the horizontal.
a) if the coefficient of friction between the skis and the snow is 0.08, find the speed when he reaches the top of the rise.
b) how much work does friction do on the skier?
Projectiles suppose that a particle has been shot into the air in such a way that the rate at which its height is changing is v .
A potter's wheel is rotating around a vertical axis through itscenter at a frequency of 1.7 rev/s. What is the frequency of the wheel after the clay sticks to it
An object weighing 20 N moves horizontally toward the right a distance of 5.0 m. What is the work done on the object by the force of gravity?
If the breakers at a beach are separated by 4.0 m and hit shore with a frequency of0.24 Hz, with what speed are they traveling
the current in an incandescent lamp is 0.5a when connected to a 120-v circuit and 0.2 a when connected to a 10-v
A 0.015 kg record with a radius of 15 cm rotates with an angular speed of 33(1/3) rpm. Find the angular momentum of the record
what is the rate of heat loss through a glass window 3.0 mm thick if the outside temperature is -20 degrees c and the
1. a spring with negligible mass stretches 34.0 cm when a 144 g gram mass is suspended from it. now i suspend a mass m
A long wire is known to have a radius greater than 5.6 mm and to carry a current that is uniformly distributed over its cross section, What is the radius (in mm) of the wire
Alpha particles of kinetic energy 5.00 MeV are scattered at 90 degrees by a gold foil. What is the impact parameter? What is the minimum distance between alpha particles and gold nucleus?
An ore sample weighs 17.5 {\rm N} in air. When the sampleis suspended by a light cord and totally immersed in water, thetension in the cord is 11.2 {\rm N}. Find the total volume of the sample
In an old house, the heating system uses radiators, which arehollow metal devices through which hot water or steam circulates. what is the temperature of the newly painted radiator
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