A 0.090-kg block, initially traveling at 3.0m / s and at a height of 2.0 m, slides down a frictionless track and encount
Posted: Wed Jul 06, 2022 10:14 am
A 0.090-kg block, initially traveling at 3.0m / s and at a height of 2.0 m, slides down a frictionless track and encounters a loop that is 1.4 m high. (a) What is the speed of the block at the top of the loop? (b) The block is slowed by a spring at the bottom of the track, this section of which is horizontal but not frictionless. If the stiffness of the spring is 1.2kN / m and the coefficient of friction between the block and this section of track is 0.70, what must be the minimum length of spring to stop the block?