Question

$\huge\bold\red{ELLO!!}$



In which of the following cases is the work done positive, zero or negative -

→ Work done by reporter on a suitcase in listing it from the platform on to his head.

→ Work done by the force of gravity on a suitcase as a suitcase falls down from the Porter's head.

→ Work done by a person on a book held in his hand while walking with uniform speed on a horizontal Road .


Don't Spam...​

Answer 1

Explanation:

Hola !

If a reporter carries a suitcase on his head then work done by him will be positive .

Because force and displacement tooks place in the same direction.

Thank you !

# Astro

Answer 2

$\huge\bold\red{Hey!}$

1. Positive Work
2. Negative work
3. Zero Work