Mi 10t hidden featuresTwo blocks A and B of masses m and 2m respectively are connected by a spring of force constant k. The masses are moving to the right with uniform velocity v each, The heavier mass leading the lighter one. The spring in between them is of natural length during the motion.Free fantasy lineup optimizerOne type of BB gun uses a spring-driven plunger to blow the BB from its barrel. (a) Calculate the force constant of its plunger's spring if you must compress it 0.150 m to drive the .0500-kg plunger to a top speed of 20.0 m/s. (b) What force must be exerted to compress the spring?