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A crane lifts an 8-m long steel girder weighing 1600 N up 12 m off the ground. The
crane did
of work,
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O a 853J
ob 12,800J

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.

Which of the following are appropriate acceleration units?

To a of 4 x hz is 1. 0. mm nm nm