What Is the Minimum Force Required to Move the Box?

  • Thread starter Thread starter flsurfer
  • Start date Start date
AI Thread Summary
To determine the minimum force required to move an 8 kg box that has come to rest due to friction, the kinetic friction force must first be calculated based on its initial speed of 11 m/s and the distance of 46 meters it traveled before stopping. The coefficient of kinetic friction can be derived from this information. Given that the coefficient of static friction is 1.21 times greater than the kinetic friction, this value is essential for calculating the force needed to overcome static friction. Ultimately, the minimum horizontal force in Newtons can be found by applying these friction coefficients to the box's weight. Understanding these relationships is crucial for solving the problem effectively.
flsurfer
Messages
1
Reaction score
0

Homework Statement


A 8 kg box is initially traveling on a horizontal surface at a speed of 11 m/s and comes to rest after 46 meters due to the force of friction. If the coefficient of static friction is 1.21 times more than the coefficient of the kinetic friction, what is the minimum horizontal force needed in Newtons in order to move the box again?


Homework Equations


i drew out all my forces but not sure where to go from here


The Attempt at a Solution


All i found so fare was the Fn=78.48
 
Last edited:
Physics news on Phys.org
flsurfer said:

Homework Statement


A 8 kg box is initially traveling on a horizontal surface at a speed of 11 m/s and comes to rest after 46 meters due to the force of friction. If the coefficient of static friction is 1.21 times more than the coefficient of the kinetic friction, what is the minimum horizontal force needed in Newtons in order to move the box again?


Homework Equations


i drew out all my forces but not sure where to go from here


The Attempt at a Solution


Welcome to PF.

You need to first determine the force that the kinetic friction induced to slow it down.

Knowing that, you can determine the u of kinetic friction and then to figure the u of static friction that you can use to figure the force that needs to be overcome again.
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Thread 'Egg Drop Challenge! Need ideas for winning designs'

I was thinking using 2 purple mattress samples, and taping them together, I do want other ideas though, the main guidelines are; Must have a volume LESS than 1600 cubic centimeters, and CAN'T exceed 25 cm in ANY direction. Must be LESS than 1 kg. NO parachutes. NO glue or Tape can touch the egg. MUST be able to take egg out in less than 1 minute. Grade A large eggs will be used.
View full post »

Similar threads

Box and a Spring on on an inclined plane
Replies
11
Views
3K
Calculating the Minimum Force for Box to Move at Constant Velocity
Replies
2
Views
2K
Static friction: Will the box move?
Replies
5
Views
2K
Truck carrying a box, friction problem
Replies
10
Views
5K
What is the minimum horizontal force?
Replies
15
Views
11K
What is the minimum force needed to move a block with friction present?
2
Replies
92
Views
8K
Stopping distance and static friction
Replies
1
Views
4K
Box Pulled on Rough Horizontal Surface - Frictional Force
Replies
7
Views
10K
Static Friction Required to Keep the System from Moving (Two Boxes)
Replies
16
Views
3K
How to find the minimum horizontal force?
Replies
11
Views
20K

Hot Threads

Recent Insights

Back
Top