Solving Physics Work Problems - Confirm Results

  • Thread starter Thread starter Apple123
  • Start date Start date
  • Tags Tags
    Work
Click For Summary
SUMMARY

The discussion focuses on solving a physics work problem involving a 10.0-kg crate being pulled up a 20-degree incline with a 100-N force. The calculations provided include the work done by gravitational force (167.76 J), the work done by the pulling force (469.84 J), and the change in kinetic energy (302.085 J). The final speed of the crate after being pulled 5.00 m is calculated to be 7.916 m/s. These results are confirmed as accurate based on the principles of work and energy in physics.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Knowledge of work-energy theorem
  • Familiarity with kinetic and potential energy calculations
  • Basic trigonometry for resolving forces
NEXT STEPS
  • Study the work-energy theorem in detail
  • Learn about frictional forces and their impact on motion
  • Explore inclined plane physics and related problems
  • Practice calculating work done by various forces in different scenarios
USEFUL FOR

Students studying physics, educators teaching mechanics, and anyone interested in solving work-energy problems in classical mechanics.

Apple123
Messages
20
Reaction score
0
Here is the problem:
A 10.0-kg crate is pulled up a rought 20 degree incline by a 100-N force parallel to the incline. The initial speed of the crate is 1.5 m/s, and the coefficient of kinetic friction is 0.40. The crate is pulled a distance of 5.00m. Determine the work done by the:
1. Gravitational force
2. 100-n force
3. Change in KE of the crate
4. What is the speed after it is pulled 5.00m?

Here are my answers:
1. W=mgh=167.76 J
2. W=Fdcos(theta)=469.84J
3. KE=KE(f)-KE(i)= 302.085J
4. KE +W=KE(f) + PE(f)
v=7.916 m/s

Can anybody confirm these answers for me? I only feel half confident on them.
 
Physics news on Phys.org
Please do not double post
 

Similar threads

Work energy theorem problem -- Block sliding up a curved incline
  • · Replies 10 ·
Replies
10
Views
2K
Not sure how to plug in numbers for Work Energy Theorem
  • · Replies 13 ·
Replies
13
Views
3K
Calculating Motor Force & Torque
  • · Replies 9 ·
Replies
9
Views
1K
Attempting to teach this: Momentum and Impulse
  • · Replies 10 ·
Replies
10
Views
3K
Work done by the force of a man on a crate of 80N
  • · Replies 14 ·
Replies
14
Views
6K
How to Correctly Solve for the Minimum Distance Between Two Electrons?
  • · Replies 5 ·
Replies
5
Views
2K
What is the Change in Kinetic Energy of a Crate Being Pulled at an Angle?
  • · Replies 1 ·
Replies
1
Views
2K
How many crates can you load in a minute with different average power outputs?
  • · Replies 1 ·
Replies
1
Views
2K
Conundrums on energy and graphs
  • · Replies 5 ·
Replies
5
Views
1K
D’Alembert Vs Conservation of Energy
  • · Replies 3 ·
Replies
3
Views
5K