The force required to drag several objects across a floor was measured. Calculate the µK for these objects.

Block Weight Friction µK

A 150 lb 30 lb

B 20.0 N 5.0 N

C 1,500 lb 60 lb

(NOTE: I don't want want you to just give me the answer, I want to know how to work it.)

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.

Your target variable is δf, the magnitude of the difference in frequency between the waves emitted from the sonar device and the waves received by the device after reflecting off the whale. write an expression for δf in terms of the relevant frequencies using the subscript notation introduced above.