Physics; two forces on an object

  • Thread starter Thread starter triplel777
  • Start date Start date
  • Tags Tags
    Forces Physics
AI Thread Summary
Two forces, FA and FB, are acting on a 16.0 kg object, resulting in different accelerations based on their directions. When both forces act eastward, the acceleration is 0.900 m/s², leading to a net force calculation of 14.4 N. In the scenario where FA is east and FB is west, the acceleration decreases to 0.400 m/s², allowing for a second equation based on the net force. The discussion emphasizes using simultaneous equations to solve for the magnitudes of FA and FB. The solution involves combining the two equations derived from the different scenarios to find the individual force values.
triplel777
Messages
35
Reaction score
0

Homework Statement



Two forces FA and FB are applied to an object whose mass is 16.0 kg. The larger force is FA. When both forces point due east, the object's acceleration has a magnitude of 0.900 m/s2. However, when FA points due east and FB points due west, the acceleration is 0.400 m/s2, due east. Find the magnitude of FA and the magnitude of FB.

Homework Equations





The Attempt at a Solution



well Fnet= Fa+Fb= ma
so Fnet = 16*0.9
Fnet= 14.4
now what do i do?
 
Physics news on Phys.org
When both are in the same direction

Fa+Fb=ma (a = 0.9)

when in opposite directions Fa-Fb=ma, this a is in the second line of the problem
 
yes so Fa+Fb=14.4 how do i find the value of each one?
 
triplel777 said:
yes so Fa+Fb=14.4 how do i find the value of each one?

you have


Fa+Fb= constant

and

Fa-Fb= other constant


two equations with two unknowns, solve simultaneously.
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

What Are the Forces at Play in Antarctic Snowcat Towing?
Replies
3
Views
11K
Tetrahedron with 3 points fixed, and force applied to 4th
Replies
11
Views
2K
2 unknown Forces+known resultant force
Replies
1
Views
2K
Calculating Unknown Forces in a Vector Diagram
Replies
1
Views
3K
What are the forces acting on a child pulling a wagon up an inclined hill?
Replies
3
Views
4K
How is the torque shared between two points?
Replies
5
Views
4K
Find the magnitude of the electromagnetic force on electron?
Replies
3
Views
2K
Find Magnitude of FA & FB in 8.27 kg Object
Replies
2
Views
3K
Struggling to Understand Forces and Acceleration
Replies
1
Views
1K
Calculating force needed to push sled down incline
Replies
4
Views
3K

Hot Threads

Recent Insights

Back
Top