Question

when a person goes up through lift, the work done is
a) positive
b) negative
c) zero
d) infinite.
*Please answer with explanation.*​

Answer 1

Answer:

when a person goes up through lift, the work done is

a) positive

b) negative

c) zero

d) infinite.

Explanation:

when a person goes up through lift, the work done is

a) positive

b) negative

c) zero

d) infinite.

Answer 2

Answer:

zero because at cos 90 no work is done