A 1/2kg book is shoved across the table with an initial velocity of 2m/s. If it slides for a meter before coming to rest. a) what was its acceleration? Technically, this acceleration is negative, since the book is slowing downing.
b) What was the frictional force?

Determine the maximum r-value of the polar equation r =3+3 cos 0

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?