Question

the man whose mass is 50 kg climbs up 30 steps of the stairs in 30 seconds if each step is 20 cm high .calculate the power used in climbing stairs (take g=10 m/sec^2)​

Answer 1

Answer:

Answer...................

Answer 2

Given:-

→ Mass of the man = 50kg

→ Number of steps climbed by the

man = 30

→ Time taken = 30 seconds

→ Height of each step = 20cm

To find:-

→ Power used in climbing stairs

Solution:-

Total height climbed by the man :-

= 30 × 20cm

= 6m

Now, we know that :-

P = mgh/t

Where :-

• P is the power.

• m is mass of the body.

• g is acceleration due to gravity.

• h is height.

• t is time taken.

By substituting values, we get :-

=> P = 50×10×6/30

=> P = 500/5

=> P = 100 W

Thus, power used in climbing the stairs is 100W .

Some Extra Information:-

• Power of a machine is defined as the

rate of work done by the machine.

• Power is a scalar quantity.

• S.I. unit of power is Watt (W). Another

unit of power is Horse Power (HP).