A3 kg block is sliding across a horizontal surface. the initial speed of the block is 4 m/s, but because of friction the block’s speed will decrease at a constant rate (i. e., constant acceleration) until the block finally comes to a stop after sliding 8 m. what is the magnitude of the acceleration of the block (in m/s^2)? what is the average power (in w) supplied by friction as the block slows to a stop?

Atwo-stage air compressor operates at steady state, compression 10m^3/min of air from 100 kpa and 300k to 1200 kpa. an intercooler between the two stages cools the air to 300k at a constant pressure of 350 kpa. the compression processes are isentropic. a) calculate the power required to run the compressor, in kw b) compare the result to the power required for isentropic compression from the same inlet state to the same final pressure.

What is the primary force that suspension bridges use cables to hold their spans up? a. tension force b. resistance force c. normal force d. elastic force e. applied force

Consider the following position function. find (a) the velocity and the speed of the object and (b) the acceleration of the object. bold r left parenthesis t right parenthesisr(t)equals=left angle 6 t superscript 4 baseline comma 2 t cubed right angle6t4,2t3 for tgreater than or equals≥0