How Is Acceleration Calculated for a Block on a Frictionless Surface?

  • Thread starter Thread starter omc1
  • Start date Start date
  • Tags Tags
    Block
AI Thread Summary
To calculate the acceleration of a block on a frictionless surface, the force applied must be resolved into its x and y components. In this case, a 56.0 N force at an angle of 27.9 degrees results in an x component that determines the horizontal acceleration. The equation F=ma is used, focusing solely on the x direction since the y acceleration is zero. The correct method involves calculating the net force in the x direction to find the acceleration. The final acceleration of the block is derived from the horizontal force component divided by the mass of the block.
omc1
Messages
100
Reaction score
0

Homework Statement

A block of mass 6.7 kg is pulled along a horizontal frictionless floor by a cord that exerts a force of 56.0 N at an angle 27.9o above the horizontal. What is the magnitude of the acceleration of the block?

Homework Equations

f=ma



The Attempt at a Solution

i split my x and y coordinates and got x and y accelerations then used c^2=a^2+b^2 to find the magnitude of the acceleration and got 8.63m/s^2 but iam getting it wrong, please help thanks
 
Physics news on Phys.org
You only needed to find the x component of force and use F=ma to get the acceleration in the horizontal direction. The horizontal acceleration is the acceleration you're looking for.
 
Show how you wrote your net forces along x and y.
Is it possible to have acceleration along y?
 
oh ic now the acceleration in the y direction is zero. ok thanks!
 
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...
Back
Top