Work is still a four letter word

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

The discussion focuses on a physics problem involving a 2.5 kg box sliding on a table with a coefficient of kinetic friction of 0.295, connected via a string to a 3.0 kg hanging mass. The key tasks include calculating the system's acceleration, the box's velocity after being dragged 0.25 meters from an initial velocity of 0.25 m/s, and the kinetic energy of the box at that point. Participants emphasize the importance of drawing free body diagrams and identifying all acting forces to solve the problem effectively.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Knowledge of kinetic friction and its calculations
  • Ability to create and interpret free body diagrams
  • Familiarity with basic kinematic equations
NEXT STEPS
  • Calculate the net force acting on the 2.5 kg box using Newton's second law
  • Determine the acceleration of the system using the formula F=ma
  • Apply kinematic equations to find the final velocity of the box
  • Calculate the kinetic energy of the box using the formula KE=0.5mv²
USEFUL FOR

Students studying physics, educators teaching mechanics, and anyone interested in understanding dynamics involving friction and pulley systems.

kkronvall
Messages
1
Reaction score
0
A 2.5 kg box slides across the flat surface of a table. The coefficient of kinetic friction for the table/box is 0.295. The box is attached to a light string that passes over a low friction pulley and is connected to a 3.0 kg mass that is hanging vertically. (a) find the acceleration of the system (b) find the velocity of the 2.5 kg box after it has been dragged 0.25 if its initial velocity was 0.25m/s, and (c) find the kinetic energy of the box at this point.

Please help!
 
Physics news on Phys.org
Care to show us what you have tried so far, or how you think you would go about beginning the question?
Thanks
 
kkronvall said:
A 2.5 kg box slides across the flat surface of a table. The coefficient of kinetic friction for the table/box is 0.295. The box is attached to a light string that passes over a low friction pulley and is connected to a 3.0 kg mass that is hanging vertically. (a) find the acceleration of the system (b) find the velocity of the 2.5 kg box after it has been dragged 0.25 if its initial velocity was 0.25m/s, and (c) find the kinetic energy of the box at this point.

Please help!

What have you done so far? Is there a particular part that you need help with?

If you need help starting off, draw a diagram of the system, then draw free body diagrams for each component. Be sure to list all forces acting on each piece.
 

Similar threads

  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 26 ·
Replies
26
Views
3K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K