Mechanics (Non-inertial systems and Fictitious Forces)

AI Thread Summary
A sled slides down a slope with inclination α, and a man on the sled uses a spring balance to weigh an object with mass m. The key point is that the object shares the same acceleration as the sled, which affects the reading on the balance. The discussion emphasizes that air resistance is not considered in this scenario. The balance will indicate a weight that reflects the combined effects of gravity and the sled's acceleration. Understanding these dynamics is crucial for solving the problem accurately.
Physicstcd14
Messages
5
Reaction score
0
Member warned about posting with no effort

Homework Statement


A sled slides from a slope with inclination α. A man standing on the sled ‘weighs’ an object with mass m using a spring balance. What weight does the balance indicate?

I seem to be making it too complex, could anyone help me out with it?

Homework Equations

The Attempt at a Solution

 
Physics news on Phys.org
Physicstcd14 said:

Homework Statement


A sled slides from a slope with inclination α. A man standing on the sled ‘weighs’ an object with mass m using a spring balance. What weight does the balance indicate?

I seem to be making it too complex, could anyone help me out with it?

Homework Equations

The Attempt at a Solution

The object has an acceleration which is the same as the sled's (and the same direction). I suspect we are not counting air resistance.
 
Svein said:
The object has an acceleration which is the same as the sled's (and the same direction). I suspect we are not counting air resistance.
Yes that's correct I'm not counting air resistance!
 

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 '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

Acceleration = (Force of boy on sled - Force of friction)/Mass of sled
Replies
3
Views
2K
Non-inertial Frames of Reference
Replies
44
Views
5K
What is the Work Done on the Person+Sled System in an Amusement Park Ride?
Replies
1
Views
1K
Work and Kinetic Energy of a Sled
Replies
4
Views
5K
How Do Fictitious Forces Affect Bead Motion on a Circle in a Non-Inertial Frame?
Replies
22
Views
3K
Non-inertial frame of reference
Replies
1
Views
2K
Why Isn't the Normal Force on the Sled 250 N?
Replies
1
Views
3K
Trouble understanding the influence of a real spring in a system
Replies
3
Views
2K
Force problem (not for the faint of heart)
Replies
3
Views
2K
Formula for fictitious moments
Replies
1
Views
2K

Hot Threads

Recent Insights

Back
Top