Question

A 65 kg firefighter climbs a flight of stairs 20.0m height. how much work is required? :))

Answer 1

w = mass * g * height

Answer 2

65*9.8*20

Answer 3

ah! is the gravity must be positive?

Answer 4

for work, yes

Answer 5

always positive?

Answer 6

when will i use the negative gravity/

Answer 7

when you deal with vectors. Work is energy, and energy is not a vector.

Answer 8

ahhhh...i see thank you :))