5. Marsha is pushing her 12 kg bicycle up a hill. When she is 38 m from the bottom of the hill, she slips and the bicycle begins to roll down the hill. When it is still 8.0 m from the bottom of the hill, how fast is the bicycle moving?

6. A pelican flying with a speed of 18.0 m/s at a height of 5.40 m drops a 2.00 kg fish. What is the speed of the fish when it hits the water?

7. A 80. N barrel, initially at rest atop 1.0x10 2m ramp, begins rolling into a frictionless tube. The tube's course includes 3 loops with radii of 10. m and many twists and turns. When the barrel exits the track, it is on the ground. What is it's velocity as it exits the track?