Angle between Displacement and Force: 87.9 Degrees | Work and Energy Calculation

  • Thread starter Thread starter x3lifelove
  • Start date Start date
  • Tags Tags
    Angle
AI Thread Summary
The discussion centers on calculating the angle between displacement and force when a force of 640 N does 12,500 J of work over a displacement of 24.0 m. One participant initially calculated the angle as 87.9 degrees using a cosine formula but later questioned the approach. Another participant clarified the relationship between work, force, and displacement using the equation W = (Force)(displacement) and derived an angle of 35.5 degrees. The conversation highlights the importance of correctly applying the work-energy principle to determine the angle accurately. Ultimately, the correct angle is confirmed to be 35.5 degrees based on the work done.
x3lifelove
Messages
10
Reaction score
0
A force of 640 N does 12 500 J of work over a displacement of 24.0m. What is the angle between the displacement and force? I get a answer of 87.9 degrees.
 
Physics news on Phys.org
x3lifelove said:
I get a answer of 87.9 degrees.

How did you get that angle?

ehild
 
ehild said:
How did you get that angle?

ehild

I used
cos=(24.0m)/(640N)
=87.9 degrees

I feel as though i should be taking into account the work that done, but I'm not exactly sure how to.
 
What is the equation that relates work, force, and displacement? Use it to solve for the angle.
 
jhae2.718 said:
What is the equation that relates work, force, and displacement? Use it to solve for the angle.

I used the formula.
W=(Force)(displacement)
12500J= cos(x)(640N)(24.0m)
x= 35.5 degrees
 
That looks right.
 

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Similar threads

How can "work" done by a force be negative?
Replies
19
Views
1K
Find the speed of the biker at the bottom of the hill
Replies
38
Views
4K
Distribution of Energy when work is done on a system of 2 masses connected by a spring
Replies
17
Views
2K
Work energy theorem problem -- Block sliding up a curved incline
Replies
10
Views
1K
Displacement & Angle Theta: Figuring Out Centripetal Force
Replies
2
Views
1K
Block sliding on a semicircular track with friction
Replies
10
Views
2K
What is the smallest value of angular displacement of the raft?
2
Replies
54
Views
4K
Questions Regarding a Cat Going Up a Ramp
2
Replies
56
Views
4K
Angle between normal force and radial line for cylindrical coordinates
Replies
21
Views
2K
Force pulling on a string at an angle with a block at the other end
Replies
2
Views
1K

Hot Threads

Recent Insights

Back
Top