The car travels 52m in 21 seconds before it comes to a complete stop after the driver applies the brakes. What was the car's initial speed?

Suppose while hauling rocks, you accidentally drop one. it breaks apart in flat, planar sections. what type of rock did you just drop? 20 points

How to tell if two objects are in thermal equilibrium 1.the objects have the same temperature 2.the objects are the same size 3.the objects are touching each other 4.the objects temperatures are changing

In which of the following is positive work done by a person on a suitcase