A cart is moving along and very close to a level air track at a speed of 0.4 m/s. The air temperature is 20 degrees celsius. Its surface area is , thickness of the air layer is . Calculate the retarding force due to the viscosity?
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A cart with mass 310 g moving on a frictionless linear air track atan initial speed of 1.3 m/s undergoes an elastic collision with aninitially stationary cart of unknown mass. After the collision, thefirst cart continues in its original direction at 0.54 m/s.(a) What is the mass of the second cart?(b) What is its speed after impact?(c) What is the speed of the two-cart center of mass?
