How about this: Identifying Types of Forces: A Quick Guide for Science Students

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Identifying types of forces involves understanding the various influences acting on objects, such as gravity, friction, and air resistance. In the example of a rock falling through the air, gravity pulls the rock downward while air resistance opposes its motion. The discussion emphasizes the importance of recognizing these forces to grasp basic physics concepts. Additionally, the conversation highlights the necessity of being specific when identifying forces in different scenarios. Understanding these principles is crucial for science students studying mechanics.
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Hm... My science study guide tells me to identify types of forces. What do they mean? Can you help me identify forces?:confused:
 
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Can you be more specific please?
 
um... their example is : what forces are being applied to a rock falling through the air?
 
libertylovescie said:
um... their example is : what forces are being applied to a rock falling through the air?

Well there are couple you may think of on top of your head.

For instance, we don't float in the air while we are on earth. This means that there is "what" acting on us?
 

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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