What is the kinetic energy of the system

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Q. Suppose the roller coaster in Fig. 6-41 (h1 = 36 m, h2 = 14 m, h3 = 25) passes point 1 with a speed of 2.00 m/s. If the average force of friction is equal to one sixth of its weight, with what speed will it reach point 2? The distance traveled is 55.0 m.

Q. An Atwood machine consists of two masses (m1 = 225 grams, m2 = 385 grams) connected by a string over a frictionless pulley. The initial heights above the floor are H1 = 172 cm and H2 = 246 cm. Both masses start from rest at point A in the position shown; point B is just as m2 hits the floor. The total mechanical energyin the system is 13.1.

what is the kinetic energy of the system at point b?

Reference no: EM1357864

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