Relative Velocity moving sidewalk

AI Thread Summary
To solve the problem of a person walking on a moving sidewalk, the total speed must be calculated by combining the sidewalk's speed with the person's walking speed. For part A, when walking in the same direction, the combined speed is 3.3 m/s, leading to a time of approximately 3.64 seconds to cover the 12 m distance. In part B, walking in the opposite direction results in a combined speed of 0.3 m/s, requiring about 40 seconds to reach the end of the sidewalk. The key formula to use is time equals distance divided by speed. Understanding these concepts allows for accurate calculations of relative motion.
Rose1996
Messages
3
Reaction score
0

Homework Statement


A "moving sidewalk" at an airport moves at 1.5m/s and is 12 m long. A person enters the sidewalk and walks at 1.8 m/s relative to the sidewalk.
A)How much time is required for the person to reach the opposite end if the person walks in the same direction as the sidewalk is moving?
B) How much time is required for the person to reach the opposite end if the person walks in the opposite direction?The attempt at a solution
Sorry! My professor didn't really explain how to do this so I'm stuck on this problem. Thanks!
 
Physics news on Phys.org
Make an attempt.
What formulae might you be able to use, if you're calculating duration, given distance and speed?
 

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

Relative velocity during a race?
Replies
12
Views
2K
How Many Strides on a Moving Sidewalk?
Replies
2
Views
4K
Ray optics: velocity of image reflected off a moving mirror
Replies
5
Views
1K
The speed of the point of intersection of two uniformly moving lines
Replies
24
Views
1K
Calculating Relative Motion on a Moving Sidewalk
Replies
1
Views
2K
Momentum: instantaneous or average?
Replies
9
Views
1K
Is My Approach to Calculating Relative Velocity Correct?
Replies
20
Views
2K
Relative vectors - how do you determine?
Replies
1
Views
2K
River-boat problem (Relative velocity)
Replies
9
Views
6K
Descending mass on rope attached to wheel
Replies
13
Views
7K

Hot Threads

Recent Insights

Back
Top