Need to find velocity of an object I pushed off a table

  • Thread starter Thread starter Coronita
  • Start date Start date
  • Tags Tags
    Table Velocity
AI Thread Summary
To find the velocity of the object pushed off the table, first calculate the horizontal distance traveled and the time it took to fall 1 meter. The object lands 30 cm from the edge, indicating a horizontal distance of 2.3 m. Using the equations of motion and considering the coefficient of friction (0.5), the force exerted on the object can be determined to find its acceleration. The height of the table is essential for calculating the time of fall, which is necessary to solve for the initial velocity. Understanding these principles will help in solving the physics problem effectively.
Coronita
Messages
16
Reaction score
0
1.
You push a 100g object across a table and release it 2 m from the edge. The object slides across, sails off the edge falls 1m to the floor and lands 30 cm from the edge of the table. If the coefficient of friction is 0.5 what was the object's speed as you released it?



2.
f=ma

Sf= Si+Vi* (delta)t+ 1/2a*(delta)t^2

Vf=Vi+a*t


3.

Since I know how far it went horizontally and I'm given the mass I'm thinking I should be able to find the force it was pushed with and use that to find the acceleration? Does knowing how much force it's exerting down on the table help me? Not really sure how to get started :/
 
Physics news on Phys.org
i have 2 physics quizzes this week and it would be the week my tutor's going to be out of town >_<
 
if anyone answers plese send it to me as a message, I am off to work now
 
Don't you need to know the height of the table?
 
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...
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...

Similar threads

Back
Top