Energy Worksheet 2 Answers and Hints

1) KE=0J PE= 367.5J= 370J in SD. Hint: At top of path how fast is it going? And PE=mgh

2) 0J (just before it hits the ground, how high is it?)

3) 367/5J, 370J with SD (where did the KE come from? where did the PE go?)

4) 22m/s (KE=1/2mvsquared, and your know mass and KE)

5) KE= 167.5J (170J with SD) v= 14.9 m/s, 15m/s with sd
KE=367.5J-200J lost to friction = 167.5J (see number 4)