Question

A Numericals
lay A boy weighing 40 kgf climbs up asteet
30 st stops each 20cm tight in 4men and
a girl weighting 30 heyf does the same a
3 rain.
a) The work done by
6) The power developed by theon
um
33​

Answer 1

~$\small \blue {\sf{Answer }}$✨❤

$(i) Given:  \: m1 \\= \: 40kgf, \: m2=30kgf \: , \: h1 \: \\ = \: h2,t1 \\ =4minutes \: =4×60sec, \: t2 \\ =3minutes \: = \: 3×60sec \\ </p><p></p><p>$

Comparing work done by them:

Work done by girl

Work done by a boy

(ii) Comparing power developed by them:

Power developed by girl

Power developed by boy

$</p><p></p><p>Work  \: done \:  by  \: girl \: \\Work  \: done  \: by \:  a \:  boy \: = \: m2gh2m1gh1 \\ =m2m1 \\ =3040 \\ =4:3</p><p></p><p></p><p></p><p></p><p>$

Work done by girl / time taken to climb up the stairs in seconds

Work done by boy / time taken to climb up the stairs in seconds

$</p><p></p><p></p><p>                                   =3×6018004×602400 \\</p><p></p><p></p><p>                                  =4×602400×18</p><p>$

$\huge \orange {\mathfrak{Thank You }}$