Work and Mass

  • Thread starter woaini
  • Start date
  • #1
woaini
58
0

Homework Statement



A total work of 250 J is done as a guy pulls a box from the ground up to the attic, 10.0 m above the ground. What is the mass of the box?

W=250J
h=10.0m
g=9.81m/s^2
m=?


Homework Equations



W=m*g*h

The Attempt at a Solution



m=[itex]\frac{g*h}{W}[/itex]=[itex]\frac{10*9.81}{250}[/itex]=2.55kg
 

Answers and Replies

  • #2
NihalSh
199
15

Homework Equations



W=m*g*h

The Attempt at a Solution



m=[itex]\frac{g*h}{W}[/itex]=[itex]\frac{10*9.81}{250}[/itex]=2.55kg

check the equation you have written, although the answer is right.

since W=m*g*h
that means m=[itex]\frac{W}{g*h}[/itex]
 

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