Question

calculate the work done in lifting a mass of 5 kg vertically through 8m

Answer 1

$\textbf{\huge{Hey there!}}\\\\Given,\\Mass(m) = 5 \ kg\\Acceleration \ due \ to \ gravity(g) = 9.8 \ m/s^2 \approx 10 \ m/s^2\\Height(h) = 8 \ m\\\\\boxed{\boxed{\large{\textbf{\large{Work done = Potential Energy}}}}}\\\\P.E = mgh\\P.E = 5 \times 10 \times 8\\P.E = 400 \ J\\\\\boxed{\boxed{\textbf{Work done = 400 joule}}}\\\\\text{\large{Hope It Helps You!}}$

Answer 2

HERE IS THE ANSWER OF YOUR QUESTION :-

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Work done = ?

We have given that,

mass (m) = 5 kg

height (h) = 8 m

acceleration due to body (g) = 9.8

Now,

Work done = Potential energy

W = mgh

W = 5 x 9.8 x 8

W = 40 x 9.8

W = 392.0

So, the correct answer = 392

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HOPE IT HELPS YOU.