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April 1, 2015

April 1, 2015

Posted by **Bella** on Saturday, February 21, 2009 at 1:52pm.

please write out the equation for me to understand..:)

an elevator weighing 2.00 * 10^5 N is supported by a steel cable. what is the tension in the cable when the elevator is accelerated upward at a rate of 3.00 m/s^2? (g=9.81 m/s^2)

thanks a lot!

- physics -
**drwls**, Saturday, February 21, 2009 at 2:46pmF = M a, where F is the net force on the elevator.

The net force is T - M g, where t is the tension in the cable pulling it up. M g is the weight.

Therefore

T - Mg = Ma

T = M(g + a)

Note that you are given the weight W = Mg and not the mass M.

In terms of the weight,

T = W (1 + a/g)

- physics -
**Bella**, Saturday, February 21, 2009 at 3:01pmi'm still a little confused

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