Author Question: A bobsled makes a run down an ice track starting at 66 m vertical distance up the hill. If there is ... (Read 69 times)

kodithompson · **on:** Jul 28, 2018

A bobsled makes a run down an ice track starting at 66 m vertical distance up the hill. If there is no friction, what is the velocity at the bottom of the hill?
a. 27 m/s
c. 44 m/s
b. 36 m/s
d. 54 m/s

Question 2

A heat engine receives 6000 J of heat from its combustion process and loses 3600 J through the exhaust and friction. What is its efficiency?
a. 33
c. 67
b. 40
d. 73