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3 years ago

Which best explains what happens the motion of the pendulum

2 answers:

6 0

The motion of a pendulum is an example of mechanical energy conservation. There are two forces acted upon the pendulum. The first one is gravity. The force of the gravity acts in a descending direction and does work upon the bob of the pendulum. The other one is tension. Tension is an outer force that would help to change the total mechanical energy of the bob. Thus, the mechanical energy in the pendulum transforms to thermal energy as the pendulum slows down and eventually stops moving.

mr Goodwill [35]3 years ago

3 0

mechanical energy in the pendulum transforms to thermal energy as the pendulum slows down and eventually stops moving. so basically the answer is choice a : PLEASE MAKE ME THE BRAINLEST

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A 50kg meteorite moving at 1000 m/s strikes Earth. Assume the velocity is along the line joining Earth's center of mass and the

zysi [14]

As per the question, the mass of meteorite [ m]= 50 kg

The velocity of the meteorite [v] = 1000 m/s

When the meteorite falls on the ground, it will give whole of its kinetic energy to earth.

We are asked to calculate the gain in kinetic energy of earth.

The kinetic energy of meteorite is calculated as -

$Kinetic\ energy\ [K.E]\ =\frac{1}{2} mv^2$

$=\frac{1}{2}50kg*[1000\ m/s]^2$

$=\frac{1}{2}50* 10^{6}\ J$

$=25*10^6\ J$

Here, J stands for Joule which is the S.I unit of energy.

$Hence,\ the\ kinetic\ energy\ gained\ by\ earth\ is\ 25*10^6\ J$

4 0

3 years ago

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An embolus can cause which of the following?

QveST [7]

I think it’s C. Stroke if not then D

7 0

2 years ago

PLEASEEE HELPPPP

solniwko [45]

Answer:

Explanation:

average speed more than 25.0m/s.

5 0

2 years ago

Read 2 more answers

The multiple reflection of a single sound wave is a/an

JulsSmile [24]

The multiple reflection of a single sound wave is echo

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2 years ago

slader the cross section of a 5-ft long trough is an isosceles trapezoid with a 2 foot lower base, a 3-foot upper base, and an a

Ostrovityanka [42]

Answer:

0.08 ft/min

Explanation:

To get the speed at witch the water raising at a given point we need to know the area it needs to fill at that point in the trough (the longitudinal section), which is given by the height at that point.

So we need to get the lenght of the sides for a height of 1 foot. Given the geometry of the trough, one side is the depth d and the other (lets call it l) is given by:

$l=\frac{3-2}{2}\,ft+2\,ft\\l=2.5\,ft$

since the difference between the upper and lower base is the increase in the base and we are only at halft the height.

Now we can calculate the longitudinal section A at that point:

$A=d\times l\\A=5\,ft \times 2.5\, ft\\A=12.5\, ft^{2}$

And the raising speed v of the water is given by:

$v=\frac{q}{A}\\v=\frac{1\, \frac{ft^3}{min}}{12.5\, ft^2}\\v=0.08\, \frac{ft}{min}$

where q is the water flow (1 cubic foot per minute).

7 0

3 years ago