Calculating Force F3: Magnitude & Direction

AI Thread Summary
The discussion focuses on calculating the magnitude and direction of force F3 acting on a block subjected to three concurrent forces. The resultant force is given as 20.0 N at 0°, with F1 at 10.0 N at 40° and F2 at 20.0 N at 180°. The user has successfully calculated the x and y components of F1 but is uncertain how to determine the components of F3. They recognize that the sum of all forces must equal the resultant force and plan to use the Pythagorean theorem to find F3's magnitude. The conversation emphasizes the importance of vector components in solving for the unknown force.
teh81
Messages
2
Reaction score
0

Homework Statement



Three concurrent forces, F1, F2 and F3, act on a block that is placed on a
horizontal surface. The resultant force on the block is 20.0 N at 0°. If F1 = 10.0 N
at 40° and F2 = 20.0 N at 180°, calculate the magnitude and direction of the force
F3. Sketch a vector diagram (not to scale) illustrating your solution.
 
Physics news on Phys.org
What have you tried so far?
 
i drew the forces on the block.
then i found the f1 on x and y component ..
f1x= 10cos40 = 7.67N
f1y= 10sin40 = 6.43N
i know that the sum of all forces will give me 20n, is that right?
and .. the f2 is pushing the block in side < ----
but I am not sure how find the f3 on x and y component..
if i found it,
i know that i have to plug in
f3=sqrt(f3x^2+f3y^2)
 

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

How to calculate the magnitudes of three forces around a hexagon
Replies
17
Views
2K
Solving Part (b): Find F3, F4, F1 and F2
Replies
7
Views
2K
Friction problem of a block sandwiched between 2 surfaces
Replies
6
Views
1K
Calculations for Hydraulic Jacks lifting a load
Replies
2
Views
3K
To find the resultant of forces on a lamina
Replies
5
Views
3K
Equilibrium of Forces and Torques on Sawhorses Supporting a Person on a Board
Replies
6
Views
2K
Determining vector angle: why do we need to add 180°
Replies
7
Views
8K
Calculate the work required to move the block
Replies
28
Views
4K
Calculating the Force and Torque on a current loop
Replies
3
Views
4K
Vector problem, magnitude of the force
Replies
30
Views
2K

Hot Threads

Recent Insights

Back
Top