A student who weights 500 n climbed the stairs the first floor to the third floor, 15 m above, in 20 sec.
how much work did she do?
what was her power?

Cpowerlifting my boi

The correct choice is c

I'm having some difficulty seeing the diagram clearly.but the question says there's a net inward force on the object.so we know right away,  from newton's 2nd law of motion, thatthat baby is accelerating.  it doesn't even matter which way thenet force is pointing.  if there's any net force, then either theobject's speed or else its direction must be changing.