Author Question: A Hooke's law spring is mounted horizontally over a frictionless surface. The spring is then ... (Read 33 times)

Kikoku · **on:** Jul 28, 2018

A Hooke's law spring is mounted horizontally over a frictionless surface. The spring is then compressed a distance d and is used to launch a mass m along the frictionless surface. What compression of the spring would result in the mass attaining double the speed received in the above situation?
a. 1.41d
c. 2.00d
b. 1.73d
d. 4.00d

Question 2

Of the following heat engines, which has the highest efficiency?
a. Hero's engine
c. a car's gasoline engine
b. a Carnot engine
d. a truck's diesel engine