An elevator in a tall building is allowed to reach a maximum speed of 3.3 m/s going down. What must the tension be in the cable to stop this elevator over a distance of 3.4 m if the elevator has a mass of 1320 kg including occupants?

2114 newtons

Explanation:

Assuming the tension in the cable constant, the deacceleration of the elevator is constant too. So, we can use the Galileo's kinematic equation:

With v the final velocity that is zero because is the velocity when the elevator stops, vo the initial velocity that is the velocity the elevator is allowed to reach, a the acceleration and Δx the distance the elevator takes to stop. Solving for a:

Now with the acceleration we can use Newton's second law to find the force (the tension) on the cable:

with F=T the tension, and m the mass of the elevator including occupants, solving for T

report!

explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."

part 1: which substance has a higher solubility?

a

smallest amount left undissolved atall temps in table shown most has dissolved high sol'by