A block of mass 200g is sitting on top of another block of three times that mass which is on a horizontal frictionless surface a
nd is attached to a horizontal spring. The coefficient of static friction between the blocks is 0.2. The lower block is pulled until the attached spring is stretched by 5.0cm and is then released from rest. Find the maximum value of the spring constant for which the upper block does not slip on the lower block.
They're impressions of organisms preserved in rock. Paleontologists use fossil remains to understand different aspects of extinct and living organisms. They do this by analyzing invertebrate fossils. All of this, all this studying helps to know our past.