Q1. A massless string runs around two massless, frictionless pulleys. An object with mass m = 12.20 kg hangs from one pulley. A force F is exerted on the free end of the string. What is the magnitude of the force F if the object is lifted at the constant speed?
Q2. A 0.154 kg glider is moving to the right on a frictionless, horizontal air track with a speed of 0.800 m/s. It has a head-on collision with a 0.292kg glider that is moving to the left with a speed of 2.16m/s. suppose the collision is elastic.
Find the magnitude of the final velocity of 0.154 kg glider
Find the magnitude of the final velocity of 0.292 kg glider