Answer Happy

Q1. the spring shown in fig P-1536 has a normal length of 12 in. It is compressed to half its length and the blocks are suddenly released from rest. Determine the velocity of each block when the spring is again 12 in. long /k-60 lb/in 50 lb INNNNNN-30 lb 12" Perfectly smooth surface FIG. P-1536. Q2. A wooden pile that weighs 500 lb is driven into the ground by successive blows of a hammer weighing 1000lb that falls freely through a distance of 6ft upon the head of the pile. The average resistance to penetration is 4000 lb. How far does a single blow of the hammer drive the pile into the ground? Assume that the hammer and pile cling together after impact. Q3. A 1200-lb hammer falling freely through 3 ft drives a 600lb pile in. vertically into the ground. Assuming the hammer and pile cling together after impact, determine the average resistance to penetration of the pile