Question

a Athlete weight 60 kg runs up a staircase having 10 steps of 0.5 m 30 seconds calculate its power?​

Answer 1

Answer:

Height ran by the athlete: 10 × 0.5 = 5 m

Mass of the athlete = 60 kg

Acceleration acting on the athlete = gravity = 10 m/s²

Therefore, Work Done = Mass × Acceleration × Height

⇒ Work Done = 60 kg × 10 m/s² × 5 m

⇒ Work Done = 600 N × 5 m = 3000 J

Now we know that, Power is work done per unit time.

So Time taken for whole process is 30 seconds.

Hence, Power = 3000 J / 30 sec

⇒ Power = 100 J/sec or 100 W

Hence this is the required answer.

Hope it helped !!

Thanks !!

Answer 2

100 joules/second

Height ran by athlete: 10 × 0.5 = 5 m

Mass of  athlete= 60 kg

Acceleration acting on athlete = gravity and gravity is 10 m/s²

Work Done = Mass × Acceleration × Height

⇒ Work Done = 60 kg × 10 m/s² × 5 m

⇒ Work Done = 600 N × 5 m = 3000 J

we know that, Power is work done per unit time.

So Time taken for process is 30 seconds.

Hence, Power = 3000 J / 30 sec

⇒ Power = 100 J/sec