At start: PE only
At end: KE and energy lost to friction
PE = KE + E
E = PE - KE
= mgh - (1/2)mv^2
= (40)(9.8)(12) - (.5)(40)(10)^2
= 2704J
It is b!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
your answer is C
Step-by-step explanation:
vertices neither contain angle nor contain complement
