Homework Answers
here,
the weight of cannon ball , W = 196 N
maximum height , hm = 29.4 m
air resistance force , F = 98 N
a)
the work done by gravity as it climbs to the height of 29/4 m , W1 = W * hm * cos(180)
W1 = 196 * 29.4 * (-1) J
W1 = - 5762.4 J
b)
the work done by air resistance , W2 = F * hm * cos(180) + F * hm * cos(180)
W2 = 2 * 98 * 29.4 * (-1) J
W2 = - 5762.4 J
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