Answer:
W = 47040 J
Explanation:
Given that,
The mass of a student, m = 60 kg
Height of the tower, h = 80 m
We need to find the work done in climbing the tower. The work done is given by :
W = mgh
So,
W = 60 × 9.8 × 80
W = 47040 J
So, the required work done is 47040 J.
Answer:
In an a.c generator, slip rings are used.
Adaptation: <em>They</em><em> </em><em>are</em><em> </em><em>not</em><em> </em><em>directly</em><em> </em><em>connected</em><em> </em><em>directly</em><em> </em><em>to</em><em> </em><em>carbon</em><em> </em><em>brushes</em><em>,</em><em> </em><em>hence</em><em> </em><em>donot</em><em> </em><em>come</em><em> </em><em>into</em><em> </em><em>contact</em><em> </em><em>when</em><em> </em><em>the</em><em> </em><em>rectangular</em><em> </em><em>coil</em><em> </em><em>rotates</em><em>.</em>
Explanation:

C. The work done by the 5500.0 N force on the elevator is 275,000 J.
<h3>
Work done by the applied force</h3>
The work done by the 5500.0 N force on the elevator is calculated as follows;
W = Fd
where;
- F is the applied force
- d is the displacement
W = 5500 x 50
W = 275,000 J
Thus, the work done by the 5500.0 N force on the elevator is 275,000 J.
Learn more about work done here: brainly.com/question/8119756
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