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kherson [118]
2 years ago
6

What is simple machines and it type.I need it today please​

Physics
1 answer:
raketka [301]2 years ago
4 0

Simple machines are tools, devices or objects that are used to make work easier.

TYPES OF SIMPLE MACHINES.

  • Levers
  • Inclined Plane
  • Wedges
  • Screw
  • Pulley
  • Wheel & Axle

<u>T</u><u>H</u><u>E</u><u> </u><u>L</u><u>E</u><u>V</u><u>E</u><u>R</u><u>S</u>

A lever is simply a plank or ridge beam that is free to rotate on a pivot.

<u>P</u><u>A</u><u>R</u><u>T</u><u>S</u><u> </u><u>O</u><u>F</u><u> </u><u>A</u><u> </u><u>L</u><u>E</u><u>V</u><u>E</u><u>R</u><u> </u>

  1. Load
  2. Effort
  3. Fulcrum or pivot

<u>C</u><u>L</u><u>A</u><u>S</u><u>S</u><u>E</u><u>S</u><u> </u><u>O</u><u>F</u><u> </u><u>L</u><u>E</u><u>V</u><u>E</u><u>R</u><u>S</u>

THE FIRST CLASS LEVER

In this class, the FULCRUM is between the EFFORT and the LOAD. The mechanical advantage is more if the load is closer to the FULCRUM. Examples: seesaws, boat oars and crowbars.

THE SECOND CLASS LEVER

In this class, the LOAD is between the EFFORT and the FULCRUM. The mechanical advantage is more if the LOAD is closer to the FULCRUM. Example: wheelbarrow.

THE THIRD CLASS LEVER

In this class, the EFFORT is between the LOAD and the FULCRUM. The mechanical advantage is more if the EFFORT is closer to the LOAD. Example: garden shovel.

<u>T</u><u>H</u><u>E</u><u> </u><u>INCLINED</u><u> </u><u>PLANE</u><u> </u><u>OR</u><u> </u><u>RAMP</u>

An inclined plane is a simple machine with a sloping surface. It makes it easier for us to move objects from lower grounds to higher grounds.

<u>W</u><u>E</u><u>D</u><u>G</u><u>E</u><u>S</u>

A wedge is simply a triangular tool, often made of wood, stone, metal or plastic. It is thick at one end and tapers to a thin or sharp edge at the other end. Examples: knife, axe, doorstopper, nail, blade on the snow plough or farmer grader.

<u>PULLEY</u>

A pulley is simply a wheel with a groove in it, and a rope in the groove. It is used to lift heavy objects from the ground to high places.

<u>WHEEL</u><u> </u><u>&</u><u> </u><u>AXLE</u>

Involves two circular objects joined at the center. It works when force is applied to the wheel or when force is applied to the axle. Example: door knob.

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 E_interior = 0

Explanation:

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If we apply Gauss's law, as the charge is on the surface, when drawing a spherical Gaussian surface, we see that there is no charge inside, therefore there is no electric field inside the metallic sphere.

          E_interior = 0

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Water has a mass per mole of 18.0 g/mol, and each water molecule (H20) has 10 electrons. (a) How many electrons are there in one
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Answer:

total number of electron in 1 litter is 3.34 × 10^{26} electron

Explanation:

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mass per mole = 18 g/mol

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how many electron in 1 liter of water

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total number of electron in water is = no of electron ×molecules per gram mole × no of moles

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mass of 1 litter = 1000 × 1 × 10^{-3}

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total number of electron in 1 litter =  mass of 1 litter × \frac{molecules per gram mole}{mass per mole}

total number of electron in 1 litter =  1000 × \frac{6.02*10{24}}{18}

total number of electron in 1 litter is 3.34 × 10^{26} electron

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A 720 g softball is traveling at 15.0 m/s when caught. If the force of the glove on the ball is 520 N, what is the time it takes
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The time it takes the ball to stop is 0.021 s.

Explanation:

Given;

mass of the softball, m = 720 g = 0.72 kg

velocity of the ball, v = 15.0 m/s

applied force, F = 520 N

Apply Newton's second law of motion, to determine the time it takes the ball to stop;

F = ma = \frac{mv}{t} \\\\t = \frac{mv}{F} \\\\t = \frac{0.72 \ \times \ 15}{520} \\\\t = 0.021 \ s \\

Therefore, the time it takes the ball to stop is 0.021 s.

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