Num. a metal ball bearing of specific heat c, moving with speed v, is brought to rest. all its kinetic energy
is converted into thermal energy which it absorbs, causing a temperature rise at. what was the value
of v?
a. cat b. 20at
c. cat d. 2cat

Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?