Kinematics / Forces Friction Problem?

AI Thread Summary
A baseball player slides into third base at an initial speed of 7.00 m/s, with a coefficient of kinetic friction of 0.37. The problem initially appears to lack sufficient information, particularly regarding the player's mass or weight. However, it is suggested to treat the mass as a variable 'm' to proceed with calculations. This approach allows for the determination of how far the player slides before coming to rest. Ultimately, the user successfully solves the problem using this method.
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Homework Statement


A baseball player slides into third base with an initial speed of 7.00 m/s. If the coefficient of kinetic friction between the player and the ground is 0.37, how far does the player slide before coming to rest?

Homework Equations


All Kinematics and Forces Equations


The Attempt at a Solution


I'm not really sure how to start this problem; there doesn't seem to be enough information given. If the coefficient of friction is given, I feel like I should know what the Normal Force is, but I don't have the mass or the weight of the player, so I'm kind of lost as to how I should start this.

Help?
 
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Call the mass 'm' and continue. Maybe you won't need the actual value. :wink:
 
Okay, thanks! That helped a bunch! I got the answer!
 

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...
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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...
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