Tension elevator on a scale problem

AI Thread Summary
When a 71 kg man stands in an elevator accelerating upward at 3 m/s², the scale reads his weight as the sum of gravitational acceleration and the elevator's acceleration. The formula used is F = m*(g + a), where g is the acceleration due to gravity (approximately 9.81 m/s²). This results in an effective weight that is higher than his normal weight due to the additional upward force. The calculation confirms that the scale will show an increased weight reading while the elevator is accelerating upwards. Understanding this concept is essential for solving similar physics problems involving forces in non-static situations.
freepancakes
Messages
5
Reaction score
0
a 71 kg man is standing in an elevator on a scale. the elevator is traveling up with an acceleration of 3 m/s^2. what does the scale read the weight of the man as?

thanks guys!
 
Physics news on Phys.org
would you use F=ma and then find the diffrence and get a "new" acceleration for gravity which would be greater?
 
freepancakes said:
would you use F=ma and then find the diffrence and get a "new" acceleration for gravity which would be greater?

Basically yes.

F = m*a = m*(g + a)
 

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

Calculate elevator acceleration using mass
Replies
9
Views
4K
Spring scale tension
Replies
15
Views
1K
Elevator Motion and Bathroom Scale Readings
Replies
2
Views
2K
Elevator Problem: Determining Scale Reading for a Moving Object
Replies
5
Views
1K
Calculating Elevator Acceleration: Solve for F=ma
Replies
3
Views
2K
Mechanics: Elevator Accelerating Downward
Replies
10
Views
4K
Understanding Sign Conventions in Elevator Tension Problems
Replies
6
Views
3K
Climbing a ladder in an elevator
Replies
12
Views
2K
Angular acceleration problem for a pulley used to raise an elevator
Replies
8
Views
2K
Calculating Net Force of 3 Blocks in an Elevator
Replies
9
Views
2K

Hot Threads

Recent Insights

Back
Top