Coefficient of friction between skis-snow
An Olympic skier moving at 20 m/s down a 30o slope encounters a region of wet snow and slides 145 m before coming to a stop. What is the coefficient of friction between the skis and the snow if the combined mass of the skier and skis is 55 Kgm?
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Two boxes (m2 is higher up the ramp than m1) m1=1.0kg with a coefficient of knietic friction of 1.0, and m2= 2.okg with a coefficient of kinetic friction of 2.0 are placed on a plane of 30 degrees. Which is the acceleration of each box?
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Two trains heading toward each other on the same track are initially separated by 1000 km. One train is heading east at 20 m/s and the other is heading west at 30 m/s. When and where will the trains collide?
What is the volume occupied by 28.2g of argon gas at a pressure of 1.06atm and a temperature of 360K ?
Explain why covalent bonds are formed when nonmetals from the right side of the periodic table bond with each other. Give two examples of such compounds.
Three 1.2 kg masses are located at the vertices of an equilateral triangle 88 rm cm on a side, connected by rods of negligible mass. Find the rotational inertia of this object (a) about an axis through the center of the triangle and perpendicular
An electric motor rotating a workshop grinding wheel at a rate of 96 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 1.70 rad/s2.
What is the rms speed of nitrogen molecules contained in an 6.9 m3 volume at 2.0 atm if the total amount of nitrogen is 1000 mol?
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