Nicolo` works on weekends at a Slow Food Parlor. He fills a pitcher full of Cola, places it on the counter top and gives the 2.6 kg pitcher an 8.8 N forward push over a distance of 48 cm to send it to a customer at the end of the counter. Ignore friction. If the pitcher starts from rest, determine its final kinetic energy when Nicolo` is done pushing it.

4.22 J

Explanation:

Given

mass of pitcher

Force applied  

distance moved

Applying work-Energy theorem which states that work done by all the forces is equal to the change in kinetic energy of the object

Work done by force

W=

change in kinetic Energy =

K.E.-0=

K.E.=

what is the actual question though?

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form