Question

A girl of mass 40 kg climbs a rope of length 6 meter long at constant speed in 15 seconds . What power she expends during the climb

Answer 1

Answer:

the powr she expel is 19

Answer 2

Answer: 160 W

Explanation:

Here,

Mass=40 kg

We know,

Force=Mass×Acceleration

In this case, acceleration is the acceleration due to gravity, which is 10m/s^2.

So,

Force=40×10

=400N

Displacement=6m

So,

Work done=Force×Displacent

=400×6

=2400 joules or 2400J

We know,

Power=Work Done/Time thaken to do the work

or, Power=2400/15

=160 watts or 160 W