Lili pulls a 6.00-kg crate across a horizontal floor for a distance of 3.00 m as shown. The tension force in the rope is 86 N and the angle is 30.0° with respect to the horizontal. The frictional force on the crate is 12.0 N. Assuming the system is crate+earth+floor, match the answers with questions. ΔK + ΔUg + ΔUsp + ΔEth + ΔEch = Wexternal What is the change in gravitational potential energy (ΔUg)? What is the change in thermal energy (ΔEth)? What is the change in kinetic energy (ΔK)? What is the work done by the external force (Wexternal)?
Lili pulls a 6.00-kg crate across a horizontal floor for a distance of 3.00 m as shown. The tension force in the rope is 86 N and the angle is 30.0° with respect to the horizontal. The frictional force on the crate is 12.0 N. Assuming the system is crate+earth+floor, match the answers with questions. ΔK + ΔUg + ΔUsp + ΔEth + ΔEch = Wexternal What is the change in gravitational potential energy (ΔUg)? What is the change in thermal energy (ΔEth)? What is the change in kinetic energy (ΔK)? What is the work done by the external force (Wexternal)?
University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter2: Vectors
Section: Chapter Questions
Problem 21CQ: What is wrong with the following expressions? How can you correct them? (a) C=AB , (b) C=AB , (c)...
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Lili pulls a 6.00-kg crate across a horizontal floor for a distance of 3.00 m as shown. The tension force in the rope is 86 N and the angle is 30.0° with respect to the horizontal. The frictional force on the crate is 12.0 N.
Assuming the system is crate+earth+floor, match the answers with questions.
ΔK + ΔUg + ΔUsp + ΔEth + ΔEch = Wexternal
What is the change in gravitational potential energy (ΔUg)? |
|
What is the change in thermal energy (ΔEth)? |
|
What is the change in kinetic energy (ΔK)? |
|
What is the work done by the external force (Wexternal)? |
A. |
-187 J |
B. |
187 J |
C. |
223 J |
D. |
259 J |
E. |
none of the given |
F. |
36 J |
G. |
0 J |
H. |
-36 J |
I. |
-223 J |
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