El sistema es liberado desde el reposo en la configuración mostrada en la figura a t = 0. Determine el tiempo en el cual el bloque de masa m1 toca el extremo inferior del cuerpo
de masa m2. Además, determine la distancia recorrida por el cuerpo de masa m2. Use los
valores m1 = 0,5 kg, m1 = 2 kg, μS = 0,25, μK = 0,25 y d = 0,4 m.

An incident ray through the focal point of a spherical mirror will: reflect through the center of curvature. reflect back through the focal point. reflect parallel to the principle axis. reflect the same direction as the incident ray.

Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 96 rad/s. the wheel is run at that angular velocity for 40 s and then power is shut off. the wheel slows down uniformly at 1.5 rad/s2 until the wheel stops. in this situation, the time interval of deceleration is closest to:

Abar magnet cut in half will form a total ofpoles. a)fourb)eightc)two