The discussion revolves around calculating the acceleration of an elevator lifted by a cable with a tension of 50,000N, while the weight of the elevator is 49,000N. The net force acting on the elevator is determined to be 1,000N. By using the formula for acceleration, a = net force / mass, where the mass is calculated as 4,900kg (derived from the weight divided by gravitational acceleration), the acceleration is found to be 0.2041 m/s². This calculation confirms the correct application of Newton's second law of motion.
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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