5. Highlight the letter of the object that has the greatest momentum. a. a 700-gram bird flying at a velocity of 2.5 m/s
b. a 40-kilogram shopping cart rolling along at 0.5 m/s
c. a 300-kilogram roller coaster car traveling at 25 m/s zo 277)​

Consider lifting a box of mass m to a height h using two different methods: lifting the box directly or lifting the box using a pulley (as in the previous part). what is wd/wp, the ratio of the work done lifting the box directly to the work done lifting the box with a pulley?