Two blocks sliding on a frictionless surface with the less massive block moving twice as fast as the more massive block. Eventually, the smaller block catches up and collides with it, and sticks. What is the speed of the two blocks after the collision given the speed of the more massive block is

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

As a car drives with its tires rolling freely without any slippage, the type of friction acting between the tires and the road is 100) a) static friction. b) kinetic friction. c) a combination of static and kinetic friction. d) neither static nor kinetic friction, but some other type of friction. e) it is impossible to tell what type of friction acts in this situation.

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?