Answer:
Following are the answer to this question:
Explanation:
Formula:

Calculating point A:
when the value is 




Calculating point B:
when the value is 



Calculating point C:
when the value is 




Calculating point D:
when the value is 




Calculating point E:
when the value is 




I got you kid It’s A- 2.5m/sb
Answer:
vB = 12 m/s
W = 36 J
Explanation:
Potential energy converts to kinetic energy
½mv² = mgh
v = √(2gh)
vB = √(2(9.8)(7.1 - 0) = 11.796609... m/s
W = mg(hA) - mg(hB) = 0.8(9.8)(7.1 - 2.5) = 36.064 J