Question

A crane operator lowers a 16,000N steel ball with a downward acceleration of 3m/s2. The tension force of the cable is
A) 4900N
B) 11,000N
C) 16,000N
D) 21,000N

Answer 1

Answer:

I think answer is 4900 N

Explanation:

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Answer 2

Answer:

answer is 11000N by formula T-mg=ma

mass if the steel is

W=mg

16000=m×9.81

16000/9.81=1630

m=1630kg

T-1630×9.81=1630×3

T-15990.3=4890

T=15990-4890=11000