a glider of mass m is free to slide along a horizontal q/c air track. it is pushed against a launcher at one end s of the track. model the launcher as a light spring of force constant k compressed by a distance x. the glider is released from rest. (a) show that the glider attains a speed of v 5 x(k/m)1/2. (b) show that the magnitude of the impulse imparted to the glider is given by the expression i 5 x(km)1/2. (c) is more work done on a cart with a large or a small mass?