Question

An elevator has a mass of 1200.0 kg. It is rising at a steady speed of 3.00 m/s. What is the tension in the cable lifting the elevator?

so T=mg + ma
m=1200.0kg
g=9.8 m/s^2
a=??

I'm not sure how to get acceleration from what is given.

Answer 1

steady speed means no acceleration

Answer 2

wow...thanks I always find myself getting stumped when I have problems with steady speed. I need to remember this!

Answer 3

so if 1200 x 9.8= 11760

the answer choices provided are
11800
15400
8160
3600

I'm assuming 11800 is the answer the professor wants us to round to 3 significant figures??

Answer 4

yes