Saturday
February 28, 2015

Homework Help: physics

Posted by alexa on Saturday, July 2, 2011 at 1:48pm.

An elevator is being lifted up an elevator shaft at a constant speed by a steel cable. All fricional effects are negligible. In this situation,forces on the elevator are such that?:

A.the upward force by the cable is greater than the downward force of gravity
B. the upward force by the cable is smaller than the downward force of gravity
C.None of these: the elevator goes up because the cable is being shortened,not because an upward force is exerted on the elevator by the cable
D. the upward force of the cable is greater than the sum of the downward force of gravity and downward force due to the air
E. the upward force of the cable is equal to the downward force of gravity

Would it be choice A or C?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics - An elevator is lifted up by a thick steel cable. While the elevator is...
Physics - An elevator manufacturing company is stress-testing a new elevator in ...
Help Physics - A child with a mass of 39 kg stands on a spring scale inside an ...
physics - 2. A ball is thrown vertically upward from the 15m level in an ...
Physics - An elevator's cable is cut causing the elevator to slide down thhe ...
Physics - A 1.0 x 10^3 kg elevator carries a maximum load of 800.0 kg. A ...
physics - An elevator without a ceiling is ascending with a constant speed of ...
Physics - While an elevator of mass 2681 kg moves upward, the tension in the ...
physics - The cavle on an elevator is what pulls the elevator up, and allows it ...
Physics - An elevator weighing 10 000N is supported by a steel cable. Determine ...

Members