A worker (on earth) dropped a screwdriver from the top of an elevator shaft. Exactly 5 seconds later he heard the sound of the screwdriver hitting the bottom of the shaft. How tall is the elevator shaft?© BrainMass Inc. brainmass.com October 25, 2018, 5:09 am ad1c9bdddf
Let us analyze the motion of this screwdriver.
The initial velocity of the screwdriver is v0 = 0 when it was dropped by the worker.
Once it is in the air, it ...
It finds the height of the elevator shaft by dropping a screwdriver.
Spring Constant, Length; Work Done by Gravity and Compression
One safety mechanism used in elevators consists of a giant spring located at the bottom of the elevator shaft. In one particular shaft, the spring has a spring constant of 8.00x10^4 N/m, and the elevator car weighs 8250 N.
a. Exactly 28.0 m above the spring, the resting elevator's cable snaps and the car falls to the bottom of the shaft. How fast is the elevator travelling when it first touches the spring?
b. If the spring starts out with a length of 3.00 m, how long is it at the moment the car stops?
c. Calculate the work done on the elevator (1) by gravity, up to the point the elevator first touches the spring; and (2) by the compression of the spring.View Full Posting Details