How Much Force Must the Man Exert to Move the Box?

  • Thread starter Thread starter Ryo124
  • Start date Start date
  • Tags Tags
    Friction
Click For Summary

Homework Help Overview

The problem involves a man pushing a heavy box with a mass of 100kg, considering the effects of friction and acceleration. The context is rooted in classical mechanics, specifically Newton's laws of motion.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss the necessity of overcoming frictional force and the application of Newton's second law. There is a question about the minimum force required to initiate movement and the relationship between force, mass, and acceleration.

Discussion Status

The discussion includes attempts to clarify the forces acting on the box and the calculations involved. Some participants confirm the need to consider friction, while others suggest applying Newton's laws to analyze the situation further.

Contextual Notes

There is a mention of frictional force being 150N and an acceleration of 0.3m/s², which may influence the calculations. The original poster expresses uncertainty about how to approach the problem.

Ryo124
Messages
101
Reaction score
0

Homework Statement



A man pushes a heavy box. The mass of the box is 100kg. There is friction between the man and the floor; the frictional force is 150N. As the mas pushes hard, the box accelerates with acceleration 0.3m/s/s. Calculate the force F exerted by the man on the box.

Homework Equations



F = ma

The Attempt at a Solution



Does the man need to at least exert 150N to overcome the force of friction? I don't know how to attempt the problem.
 
Last edited:
Physics news on Phys.org
Ryo124 said:
Does the man need to at least exert 150N to overcome the force of friction?
Absolutely. If you drew a diagram of the situation (always a good idea), what horizontal forces would you show acting on the box? Apply Newton's 2nd law to the box.
 
So the answer would be 180N, correct?
 
Correct.
 

Similar threads

Static Friction Between a Box and the Floor
  • · Replies 11 ·
Replies
11
Views
3K
Finding Force by using the coefficient of friction and mass
  • · Replies 16 ·
Replies
16
Views
3K
Friction Force exerted on an object
  • · Replies 6 ·
Replies
6
Views
3K
Calculating the frictional forces on a sliding box on a ramp
  • · Replies 2 ·
Replies
2
Views
4K
A man wants to move some heavy boxes up to the loft in his barn
  • · Replies 2 ·
Replies
2
Views
1K
Find force box exerts on other box up incline
  • · Replies 11 ·
Replies
11
Views
2K
Calculate the work done moving a crate
  • · Replies 3 ·
Replies
3
Views
3K
Friction problem (pushing a box)
  • · Replies 3 ·
Replies
3
Views
4K
Truck carrying a box, friction problem
  • · Replies 10 ·
Replies
10
Views
6K
Newton's third law -- I have trouble with some real-life examples
  • · Replies 6 ·
Replies
6
Views
3K