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3 years ago

A blacksmith hammers a hot piece of iron while making a tool.How does the force due to hammering effect the piece of iron ???

Physics

1 answer:

Whitepunk [10]3 years ago

4 0

Answer:

The force due to hammering changes the shape of the piece of iron

Explanation:

How hard you hammer the iron while it is hot will cause the iron to change shape or reform the way you want it.

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A worker is thinking about two ways to get a box up 1.2 m onto a loading dock. He can use a force of 250 N to lift it straight u

harina [27]

Answer:

<em>The second option has a lower power output. P=30 W</em>

Explanation:

<u>Mechanical Power </u>

It is a physical magnitude that measures the rate a work W is done over time t.

$\displaystyle P=\frac{W}{t}$

Since W=F.d

$\displaystyle P=\frac{F.d}{t}$

The first option means the worker will lift the box by a distance of 1.2 meters in 3 seconds by applying 250 N of force. That produces a power of

$\displaystyle P=\frac{(250). (1.2)}{3}=100\ Watt$

The second option requires the worker applies 75 N of force and travel a distance of 4 meters for 10 seconds, thus the power is

$\displaystyle P=\frac{(75). (4)}{10}=30\ Watt$

The second option has a lower power output

7 0

3 years ago

An ant does 1 N-m of work in dragging a 0.0020-N grain of sugar. How far does the ant drag the sugar.

algol13

The ant would drag the sugar 500m

Good luck!

8 0

3 years ago

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Lilit [14]

Answer:

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6 0

3 years ago

A block slides down a frictionless inclined ramp. If the ramp angle is 17.0° and its length is 30.0 m, find the speed of the blo

shutvik [7]

Answer:

v = 17.15 m/s

Explanation:

given,

angle of ramp = 17.0°

length of ramp(l) = 30 m

height of the ramp =

$h = l sin \theta$

$h = 30 sin 30^0$

h = 15 m

using energy of conservation

$\dfrac{1}{2}mv^2 = mgh$

$\dfrac{1}{2}v^2 = gh$

$v = \sqrt{2gh}$

$v = \sqrt{2\times 9.8\times 15}$

$v = \sqrt{294}$

v = 17.15 m/s

speed of block reaching at the bottom = v = 17.15 m/s

5 0

3 years ago

This is the method by which a wave travels through a medium or a vacuum.

madreJ [45]

It can't. Waves must have a medium to travel through

4 0

3 years ago