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3 years ago

How do simple machines make work easier?

Physics

2 answers:

Musya8 [376]3 years ago

8 0

Answer:

D. They increases the distance over which force is applied.

Explanation:

Work is defined as the quantity which applied force in the direction of motion. According to the Jefferson's Lab there are the following methods which are adopt to make the work easier in performing:

By tranferring a force from a one place to another.
By changing the direction of force.
By increasing the force magnitude.
By increasing the distance or speed over the force is applied.

castortr0y [4]3 years ago

3 0

work is defined as force acting on an object in the direction of motion, a machine makes work easier to perform by accomplishing one or more of the following functions: transferring a force from one place to another, changing the direction of a force, increasing the magnitude of a force, or increasing the distance or speed of a force
<span>D. They increase the distance over which a force is applied.</span>

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Mariana [72]

Answer:

1.34352 kg

Explanation:

$m_w$ = Mass of water falling = 1 kg

h = Height of fall = 0.1 km

$\Delta T$ = Change in temperature = 0.1

c = Specific heat of water = 4186 J/kg K

g = Acceleration due to gravity = 9.81 m/s²

$m_v$ = Mass of water in the vessel

Here the potential energy will balance the internal energy

$m_wgh=m_wc\Delta T+m_vc\Delta T\\\Rightarrow m_v=\dfrac{m_wgh-m_wc\Delta T}{c\Delta T}\\\Rightarrow m_v=\dfrac{m_wgh}{c\Delta T}-m_w\\\Rightarrow m_v=\dfrac{1\times 9.81\times 100}{4186\times 0.1}-1\\\Rightarrow m_v=1.34352\ kg$

Mass of the water in the vessel is 1.34352 kg

6 0

3 years ago

A coin is rolled in a straight line along a balcony edge at a steady speed of 0.5 m/s. a) Calculate how far the coin rolls in 2.

NemiM [27]

Use this equation (v=Δx/t); plug in velocity (0.500 m/s) and the time (2.4 s), then solve for displacement… (Δx=1.2 m)

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2 years ago

a bicyclist travels with an averahe velocity of 15km/h north, for 20 minutes .what is his displacement ?

Lunna [17]

Explanation:

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= 4.17 m/s

time= 20 min= 20 × 60s

= 1200s

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we know that,

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or, D = 4.17 × 1200

or,D = 5004 m

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3 years ago

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m_a_m_a [10]

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F = force applied by ron towards left

F' = force applied by hermoine towards right

a = acceleration of the book

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- F + F' = ma

Given that : F = F'

hence

- F' + F' = ma

0 = ma

a = 0 m/s²

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so correct choice is

D) The book will not move

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