Question

A student ate a Thanksgiving dinner that totaled 2800 Cal . He wants to use up...

A student ate a Thanksgiving dinner that totaled 2800 Cal . He wants to use up all that energy by lifting a 23-kg mass a distance of 1.0 m. Assume that he lifts the mass with constant velocity and no work is required in lowering the mass.

Part A

Part complete

How many times must he lift the mass?

Express your answer using two significant figures.

N =

5.2×104

SubmitPrevious Answers

Correct

Part B

If he can lift and lower the mass once every 5.2 s , how long does this exercise take?

Express your answer using two significant figures.

t=


3.39{\cdot}10^{5}

  s  

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Answer #1

Cenvert Calories to emesay osue 1 n Find the or mount ot joules 2 800 col84 2800 Joci 1171 S, 2.J ed Find the onmroumt of tne

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