Dynamics (Kinematics) relative motion, HELP

AI Thread Summary
The problem involves determining the velocity of piston C in a rotating bar AB with an angular velocity of 10 rad/s at an angle of 45 degrees. The user calculated the velocity Vb using the equation Vb = w * rab, resulting in 2108.2 cm*rad/s. They are uncertain whether to use the given angular velocity of 10 rad/s for further calculations involving Vc. The discussion focuses on clarifying the correct application of angular velocity in the context of relative motion and instantaneous centers. Understanding the correct use of angular velocity is crucial for accurately determining the velocity of piston C.
badaboom
Messages
23
Reaction score
0

Homework Statement



The bar AB is rotating with an angular velocity w=10rad/s. Determine the velocity of the piston C at the instant θ = 45. Provide the vector solution and the solution with the instantaneous center of zero velocity


Homework Equations


Vb = Va + w x r(b/a)
Vc = Vb + w x r(b/c)
vb = w*r(b/ic)



The Attempt at a Solution


I found Vb (Vb = w*rab) Vb=2108.2 cm*rad/s. Vc = 2108.2cm*rad/s + w*224.6cm. IS the w I use for the equation the one given to me (10 rad/s) or is it another one?
 

Attachments

  • problem.jpg
    problem.jpg
    13.7 KB · Views: 561
Physics news on Phys.org
pleaseeeeeeeeeeeeeeee
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations'

Thread 'Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations'

Figure 1 Overall Structure Diagram Figure 2: Top view of the piston when it is cylindrical A circular opening is created at a height of 5 meters above the water surface. Inside this opening is a sleeve-type piston with a cross-sectional area of 1 square meter. The piston is pulled to the right at a constant speed. The pulling force is（Figure 2）： F = ρshg = 1000 × 1 × 5 × 10 = 50,000 N. Figure 3: Modifying the structure to incorporate a fixed internal piston When I modify the piston...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Relating Linear and Angular Kinematics
Replies
3
Views
2K
Calculate the velocity of the canoe relative to the water
Replies
8
Views
849
Really interesting and tough kinematics problem
Replies
27
Views
5K
Projectile Motion on Inclined Surface Question
Replies
5
Views
9K
Problem using vectors and relative motion
Replies
12
Views
3K
Angular speed calculation after an inelastic collision
Replies
20
Views
3K
How Do You Calculate Terminal Voltage and Potential Difference in a Circuit?
Replies
3
Views
6K
Find the Voltage in the parallel resistor-capacitor circuit
Replies
31
Views
3K
Graph of Position Seems to be Wrong
Replies
6
Views
2K
What is the velocity of cart B after the boy lands on it?
Replies
1
Views
3K

Hot Threads

Recent Insights

Back
Top