Question

how much power is used by a 40 kg athlete in climbing a 10 metre high ladder in 10 seconds.... I NEED EXPLANATION. ​

Answer 1

Explanation:

Mass of the athlete = 40kg

Weight of the athlete = 40*9.8 N = 392N

Height of the ladder = 10m

Formula for work done = Force*Displacement = Weight*Displacement (Here weight is the force of gravity acting on the body)

Therefore, work done by the athlete against gravity = 392*10 J = 3920J

Formula for power = Work done/Time taken

Therefore, 3920/10 = 392 J$s^{-1}$ = 392 W (Ans)

Here is your answer. Hope it helps!

Answer 2

Answer:

power used will be equal to the work done by the athlete to climb up ladder per unit time.

Explanation:

w = force× displacement

here force is gravitational which acts downward 40×10 = 400kN downwards

displacement = 10 m

now put the above values then u will have your answer