A pair of blocks, one more as massive than the other, are connected by a compressed spring. When the spring is released, the blocks fly apart. Compared to the heavier block, the lighter block accelerates at four times the rate of the heavier block. How many times more massive is the heavier block

On a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. it strikes a red glider that has mass 0.600 kg and that is initially at rest. after the collision, the blue glider is moving to the left with a speed of 3.00 m/s.(a) what are the magnitude and direction of the velocity of the red glider after the collision? (b) is this collision elastic?