Work, Vertical and Horizontally

[Bigdane]

A person lifts a 3.7 kg cement block a vertical distance of 1.18 m and then carries the block horizontally a distance of 7.80 m.

(a) How much work is done by the person in the process?
J

(b) How much work is done by gravity in the process?
J

w=fd?

 

[LowlyPion]

A person lifts a 3.7 kg cement block a vertical distance of 1.18 m and then carries the block horizontally a distance of 7.80 m.

(a) How much work is done by the person in the process?
J

(b) How much work is done by gravity in the process?
J

w=fd?

OK. How much work then in lifting?

How much in carrying?

 

[Bigdane]

im not sure how to find that

 

[LowlyPion]

Here are 2 treatments on figuring work:

http://www.glenbrook.k12.il.us/gbssci/Phys/Class/energy/u5l1a.html

http://www.sparknotes.com/testprep/books/sat2/physics/chapter7section1.rhtml

 

[Bigdane]

got it. thanks