Question

A crane pulls up a car of mass 500 kg to a vertical height of 4m. Calculate the work done by crane.​

Answer 1

$Mass \: (mass) = 500 \: kg$

$\\ Acceleration \: due \: to \: gravity \: (g) = 9.8 \: m/ {s}^{2}$

$\\ Height \: ( h) = 4 \: cm \:$

$\\ Potential \: energy = mgh$

$\\ = (500 \times 9.8 \times 4)J$

$\\ = 19600J = 19.6k.J$

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Answer 2

Answer:

Explanation:

Given,

Mass, m = 500 kg

Height, d = 4 m

To Find,

Work done.

Formula to be used,

Work = Force × Displacement

We know that, F = mg

So, Work = mg × h

Solution,

Putting all the values, we get

Work = mg × h

⇒ Work = 500 × 9.8 × 4

⇒ Work = 19600 J

⇒ Work = 19.6 KJ

Hence, the work done by the crane is 19.6 KJ.