The problem involves an elevator being lifted by a cable with a specified tension and weight. The original poster seeks to determine the elevator's speed after a certain time, starting from rest, but initially expresses uncertainty about how to proceed due to a lack of mass information.
Participants are exploring the relationship between force, mass, and acceleration. Some calculations have been shared, and there is a sense of collaborative problem-solving, though no consensus on the final answer has been reached.
There is an assumption made regarding the value of gravitational acceleration for simplification. The original poster expresses uncertainty about the correctness of their calculations and the derived mass.
jtwitty said:Homework Statement
An elevator is lifted by a capble with a tension fo 50,000N. The weight of the elevator is 49,000N. How fast will the elevator be moving after 5 seconds if it starts from rest.
Homework Equations
IDK!
The Attempt at a Solution
I found the net force to be 1000N (50,000 - 49,000N)
But i can't plug it in anywhere because i don't know the mass of the elevator?
suwarna07 said:ok so a = netforce /m
a = (50000-49000) / 4900
a = .2041 m/s^2
since u know w = mg
m = w/g
mass of elevator = 49000/10 (assuming g = 10 for easier purpose)
therefore mass = 4900 kg
jtwitty said:yay! thanks for your help :P