Question

А A 50 kg man with 25 kg load on his
head climbs up so steps each of height
25 cm calcuate the wookdone by
man in climbing
these steps?
​

Answer 1

Answer:

50divide 25 work done is 2steps

Answer 2

$mass \: of \: man(m_m) = 50 \: kg$

$mass \: of \: block(m_b) = 20 \: kg$

$total \: mass = m_m+ m_b = 20 + 50 = 75 \: kg$

$\\ \\ height = 25 \: cm = 0.25 \: m \\ number \: of \: steps = ?$

$suppose \: there \: are \: 20 \: steps \\ so \: total \: height \: i.e \: displacement = 20 \times 0.25 = 5 \: m$

As we know,

$\\ \implies \: workdone(W) = mgh$

$\implies \: W = 70 \times 9.8 \times 5$

$\implies \underline{ W = 3430 \: J}$

$\underline{\boxed{\sf{Work\:done\:by\:man\:is\:3430 \:J}}}$