A 10.0 kg crate is pulled up a rough incline with an initial speed of 1.5m/s. The pulling force is 100.0N parallel to the incline, which makes an angle of 15.0 degrees with the horizontal. Assuming the coefficient of kinetic friction is 0.40 and the crate is pulled a distance of 7.5 m, find the following:

a. the work done by the Earth's gravity on the crate
b. the work done by the force of friction on the crate
c. the work done by the puller on the crate
d. the change in kinetic energy of the crate
e. the speed of the crate after it is pulled 7.5 m

The answers for each one are (in order)
a. -1.9 X 10^2 J
b. -2.8 X 10^2 J
c. 7.5 X 10^2 J
d. 2.8 X 10^2 J
e. 7.6 m/s

if someone could show how to get these answers i would greatly appreciate it (again lol)

2006-11-14 10:20:08 · 1 answers · asked by strawberrylollipop12345 1 in Physics

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Hot Water vs Cold Water?

If you had 12oz hot water & 12 oz cold water and mixed them together, what actually happens - does the cold water cool down the hot or does the hot heat up the cold?

2006-11-14 10:17:40 · 8 answers · asked by Jim C 5 in Chemistry

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Does anyone know why the moon's rotation causes it to face the earth with the same side constantly?

2006-11-14 10:17:03 · 10 answers · asked by Kevin C K 1 in Astronomy & Space

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2006-11-14 10:15:44 · 2 answers · asked by Em 2 in Zoology

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slove this nuclear equation silver 116 producing a beta particle.?

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2006-11-14 10:14:02 · 8 answers · asked by blue_foil1985 1 in Earth Sciences & Geology

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germinating vs. non-germinating?

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2006-11-14 10:13:59 · 1 answers · asked by 12345 1 in Botany

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At what stage of a persons life does the belly button change from an outie to an innie?

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2006-11-14 10:13:30 · 8 answers · asked by Proinsias 2 in Biology

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solve this nuclear equation Bismuth 211 producing an alpha particle.?

2006-11-14 10:13:20 · 1 answers · asked by kimmie082krunk 1 in Chemistry

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Can jewelers cut diamonds into different shapes?

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2006-11-14 10:10:14 · 10 answers · asked by Jeremy F 4 in Earth Sciences & Geology

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2006-11-14 10:08:36 · 8 answers · asked by Anonymous in Zoology

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2006-11-14 10:06:50 · 4 answers · asked by Jia 1 in Botany

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2006-11-14 10:04:33 · 7 answers · asked by Thunor232 3 in Weather

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An elementary particle moving at 1.35 x 10^5 m/s strikes an identical particle initially at rest. After the?

collision, the particles (which cannot be distinguished) are observed moving at angles of 41.7 and 48.3 degrees relative to the original direction of motion.
Find the final speed of each particle.

2006-11-14 10:03:37 · 2 answers · asked by Anonymous in Physics

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Do u know how to doy=x^2-5x+4 so i can graph it also y=1/2x^2?

I need to have an x and y value for both of them and i know how to do it but it is not comming out right for me now.

2006-11-14 09:59:30 · 3 answers · asked by Courtney 1 in Mathematics

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Are men's nipples more sensitive than women's?

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2006-11-14 09:59:26 · 2 answers · asked by Mark 1 in Biology

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sciene chem question?

The average distance between earth and mars is about 2.08 x 10^8 km. How long does it take to transmit television pictures from the Mariner spacecraft to earth from mars?

can anyone show me how to solve this problem?

2006-11-14 09:58:38 · 2 answers · asked by Anonymous in Astronomy & Space

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