Answer:
0.531m
Explanation:
Soln
Mass = 3.2kg
Kinetic energy = 8 J
Mechanical energy = 25 J
Recall,
Mechanical energy = K.E + P.E
But P.E = mass × g × h
where g = acceleration due to gravity = 10ms² and h = height.
Mechanical energy = K.E + mass × g × h
25 = 8 + 3.2×10×h
25 - 8 = 32×h
17 = 32×h
divide both sides by 32
17/32 = h
h = 0.531 metres.
