Please need someone to check this soon

  • Thread starter Ion1776
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In summary, the change in potential energy of a 2.50 kg textbook, lowered from a height of 1.81 m to 1.50 m, is equal to -7.595 joules. The negative sign indicates that the book has lost potential energy.
  • #1
Ion1776
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3. You lower a 2.50 kg textbook (remember when textbooks used to be made out of paper instead of being digital?) from a height of 1.81 m to 1.50 m. What is its change in potential energy?

1.50-1.81=-.31
(2.50kg)(9.80)(-.31)

=-7.595?
 
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  • #2
Ion1776 said:
3. You lower a 2.50 kg textbook (remember when textbooks used to be made out of paper instead of being digital?) from a height of 1.81 m to 1.50 m. What is its change in potential energy?

1.50-1.81=-.31
(2.50kg)(9.80)(-.31)

=-7.595?

Looks good. It is particularly good that you have minus sign, indicating that the book has lost potential energy. To be perfect, give the units.
 
  • #3
The numbers are OK. I'd put in some units and some text before you turn it in.
 

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