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4 years ago

If the box weighs 40 newtons and is lifted a distance of 2 meters, how much work is done on the box?

Physics

1 answer:

Zarrin [17]4 years ago

5 0

Answer:

The work done on the box is 80 J.

Explanation:

Given that,

Weight of box = 40 N

Distance = 2 meter

We need to calculate the work done

Using formula of work done

$W=F\times x$

$W=mg\times x$

Where, x = distance

mg = weight

Put the value into the formula

$W=40\times2$

$W= 80\ Nm$

$W=80\ J$

Hence, The work done on the box is 80 J.

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2 years ago

a current of 5 ampere is passed for 2 hours in an electric iron having a resistance of 100 ohms calculate the heat produced

Alina [70]

Answer:

$\boxed{\sf Heat \ produced \ (H) = 5 \ kWh}$

Given:

Resistance (R) = 100 Ω

Current (I) = 5 A

Time (t) = 2 hours

To Find:

Heat developed (H) in the electric iron

Explanation:

Formula:

$\boxed{ \bold{ \sf H = I^2Rt}}$

Substituting values of I, R & t in the equation:

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$\therefore$

Heat developed (H) in the electric iron = 15 kWh

3 0

4 years ago

What is an atom? Give three 3 examples.

Assoli18 [71]

Answer:

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Argon [A]
Iron [Fe]
Calcium [Ca]

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Atom consists of a central nucleus that is usually surrounded by one or more electrons .Each electron is negatively charged. The nucleus is positively charged and contains one or more relatively heavy particles known as protons and neutrons.

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Hope this helps....

Good luck on your assignment...

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3 years ago

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Explanation:

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4 years ago

Starting from a state of no rotation, a cylinder spins so that any point on its edge has a contant tangential acceleration of 3.

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Answer:

Explanation:

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similarly we can calculate

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3 0

3 years ago