Calculating Net Work: A Box Being Pushed Across a Floor

Click For Summary
SUMMARY

The net work done on a box being pushed across a floor is calculated using the formula W(net) = Fd cos(theta). In this scenario, a force of 70 N is applied to the right, while a friction force of 18 N opposes it, resulting in a net force of 52 N. Given a displacement of 8 meters, the net work done is determined to be 416 joules, confirming the calculations are accurate.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with the concept of net force
  • Knowledge of work-energy principles
  • Basic trigonometry for calculating work
NEXT STEPS
  • Study the work-energy theorem in physics
  • Learn about friction forces and their impact on motion
  • Explore vector components in force calculations
  • Investigate real-world applications of net work in mechanical systems
USEFUL FOR

Students studying physics, particularly those focusing on mechanics, as well as educators looking for examples of net work calculations in applied scenarios.

subopolois
Messages
81
Reaction score
0

Homework Statement


a box is pushed horizontally across a floor with a force of 70 N to the right. There is a friction force also acting on the box in the opposite direction of 18 N. if the box is displaced 8 meters. what is the net work done on the box?

Homework Equations


W(net)= Fd cos (theta)

The Attempt at a Solution


the net forces on the box in the horizontal direction is= 70N - 18N= 52N to the right
Since its moving horizontally, which is 0 degrees. and I am given displacement as 8 meters, and the force calculated above:

w(net)= (52N)(8m) cos (0)
= 416 joules

Does this look right?
 
Physics news on Phys.org
Yeah its look like right
 

Similar threads

Physics — Net work on a box being pulled…
  • · Replies 6 ·
Replies
6
Views
2K
Understanding Work Calculations: Clarifying the Role of Forces and Intuition
  • · Replies 25 ·
Replies
25
Views
3K
Find net external work of a system w/ 2 objects w/ opposite forces
  • · Replies 8 ·
Replies
8
Views
1K
Work or Net Work when calculating Power?
  • · Replies 5 ·
Replies
5
Views
2K
A man is pushing a box from behind with a constant net force F=146 N
  • · Replies 2 ·
Replies
2
Views
2K
Correct! Thank you for catching that mistake.
  • · Replies 13 ·
Replies
13
Views
6K
Force given mass, velocity and fricton
  • · Replies 6 ·
Replies
6
Views
2K
Newton's Second law: Pushing the box
  • · Replies 6 ·
Replies
6
Views
3K
Friction of rubber box on concrete floor
  • · Replies 5 ·
Replies
5
Views
2K
Calculating net work done on an accelerating box.
  • · Replies 1 ·
Replies
1
Views
2K