Mr. Franklin uses a machine that has an efficiency of 80%. The machine applies a force of 800 N through a distance of 20 m. Mr. Franklin applies a force of 50 N on the machine. Through what distance does Mr. Franklin apply the force?
a. 4 m
b. 16 m
c. 260 m
d. 400 m

ANSWERS

2021-04-10 04:13:42

answer is d explanation: work done by the machine = F x d = 800 x 20 = 16000 J work done by mr. Franklin = W W x efficiency = 16000J W = 16000/0.8 = 20000 J distance travelled by Franklin = d_f W = 50N x d_f d_f = 20000/50 = 400

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