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3 years ago

In loading a lorry, a man lifts boxes each of weight 100N through a height of 1.5m.

Physics

1 answer:

liq [111]3 years ago

5 0

Answer:

The amount of work done in order to lift the box is $150\ Joule$

Explanation:

Given the weight of each box is $100N$

And the man lifts boxes at a height of $1.5m$

We need to find the amount of work done.

The amount of work done is the product of applied force $F$ that causes the displacement $d$ .

In our problem force is $100N$ and displacement is $1.5m$ .

Now, work done

$=force\times displacement\\=100\times1.5\\=150\ Joule$

So, the amount of work done in order to lift the box is $150\ Joule$

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2 years ago

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Answer:

t = 2.01 s

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==================================================================

Time

Use formula:

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Replace:

$\boxed{t=\sqrt{\frac{2*20m}{9.8\frac{m}{s^{2}}}}}$

Everything inside the root is solved first. So, we solve the multiplication of the numerator:

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It divides:

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==================================================================

Final Velocity

use formula:

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Multiply:

Vf = 19.7 m/s

==================================================================

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Takes time to reach the ground in 2.01 seconds.

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Read 2 more answers