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
The "Elevator problem" is a common physics problem that involves calculating the forces acting on an elevator in order to determine its acceleration.
The acceleration of an elevator is affected by the mass of the elevator, the force of gravity, and any external forces such as friction or air resistance.
The mass of the elevator is important because it affects the amount of force needed to move the elevator and the resulting acceleration. A heavier elevator will require more force to move and will accelerate more slowly.
If you do not have the mass of the elevator, you can still solve the problem using other known factors such as the force of gravity and the acceleration of the elevator. However, having the mass will provide a more accurate solution.
One way to solve the problem without knowing the mass is to use the equation F=ma, where F is the net force acting on the elevator and a is the acceleration. You can then use this equation to solve for the unknown mass.