(a) What is the expression for the magnitude of the force F required to accelerate an...
(a) What is the expression for the magnitude of the force F required to accelerate an elevator of mass m upward starting from rest to a height H to a final speed of V(f)?
(b) What is the value of the force if m=1800 kg, h=120 m, and v(f)=16m/s?
Homework Answers
a)
let the acceleration of the elevator is a
using third equation of mtoion
V(f)^2 = 2 * H * a
a = V(f)^2/(2 *H)
force required = m * a
force required = m * V(f)^2/(2 *H)
b)
for the value of F
F = 1800 * 16^2/(2 * 120)
F = 1920 N
the value of force F is 1920 N
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