Question

1. What is the friction between the boat and ramp if its speed is only ½ what it would be without friction at the end of the ramp? Diagram shown here: http://i40.tinypic.com/mbgz84.png
Answer choices
A) -1/4mgh
B) -1/2mgh
C) -3/4mgh
D) -mgh

2. What is the change in height of the ball as it swings from A to B? What is the speed of the ball at B? Diagram shown here: http://i40.tinypic.com/21b9onk.png
Choices for both parts of the question:
A) 3.7 m/s
B) 4.4 m/s
C) 14 m/s
D) 19 m/s