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3 years ago

When all individual forces acting upon an object are balanced, it is the natural tendency of the object to

Physics

1 answer:

sleet_krkn [62]3 years ago

8 0

Answer:

- maintain its state of motion

- Keep its velocity constant (either at zero or non-zero value)

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HELP PLEASEE

lozanna [386]

Answer:

Usually an eletric shock. You can be left with numbness and MAYBE problems with your eyes.

Explanation:

4 0

3 years ago

17. Suppose you attach the object with mass m to a vertical spring originally at rest, and let it bounce up and down. You releas

insens350 [35]

Answer:

See below ↓

Explanation:

Step 1 : Diagram

In attachment

Step 2

We choose the system to be the spring, the block, and the Earth and it is isolated
We put all the data in the figure we have created and create a zero level (initial height) of the block to be yₓ = 0 and the final position, when it stops and moves upwards again, to be yₙ = -A
No external forces are exerted on the system and no energy comes in or out of the system
Hence,

⇒ ΔE = 0

⇒ Eₙ - Eₓ = 0

⇒ Eₙ = Eₓ

⇒ Kₙ + Uₙ + Pₙ = Kₓ + Uₓ + Pₓ

Final kinetic energy is 0 at the lowest point

⇒ Uₙ + Pₙ = Uₓ + Pₓ

Step 3

Initial potential energy is 0 [zero level = initial height]

⇒ Uₙ + Pₙ = Uₓ

And we know that spring was originally at normal length, so initial spring energy is also 0

⇒ Uₙ + Pₙ = 0

⇒ 1/2kxₙ² + mgyₙ = 0

⇒ 1/2kxₙ² = -mgyₙ

We know xₙ = A and yₙ = -A from the diagram

⇒ 1/2kA² = -mg(-A)

⇒ 1/2kA² = mgA

⇒ [1/2kA = mg]

Step 4

Spring force is given by : F = -kx
Note : x = A

⇒ F = kA

⇒ k = F/A

⇒ Plug 'k' into the equation found at the end of Step 3

⇒ 1/2(F/A)(A) = mg

⇒ 2F = mg

⇒ F = 2mg (a)

Step 5

We know the spring will stop oscillating and be at rest at the new equilibrium position of the system

⇒ F - mg = 0

⇒ F = mg

We know that :

⇒ F = -kx

In the case x = yₙ

⇒ kyₙ = mg

⇒ yₙ = mg/k

⇒ yₙ = 0.25 x 9.8 / -10

⇒ yₙ = -0.245 m

⇒ yₙ = A

⇒ yₙ = 0.245 m (b)

Step 6

v(max) = Aω
v(max) = A√k/m
v(max) = 0.245 x √(10/0.25)
v(max) = 1.55 m/s (c)

8 0

2 years ago

What are the two elements that were discovered usig the battery?

BARSIC [14]

Silver and zinc were discovered while using a battery

5 0

3 years ago

A satellite in orbit around the earth has a period of one hour. An identical satellite is placed in an orbit having a radius tha

Advocard [28]

Answer:

27h

Explanation:

We can answer this problem with Kepler's third law:

$\frac{T^2}{a^3} =constant$

where $T$ is the period and $a$ is the semi-major axis of an ellipse, but because the satellite's orbit is around the earth it must be a circular orbit, so that $a$ becomes the radius $r$ of a circle.

$\frac{T^2}{r^3} =constant$

what this tells us is that the relationship between the first period with radius $r$ must be equal to the second period when the radius is now 9 times the original (the second radius is $9r$ because the orbit is nine times larger):

We will have the following:

$\frac{T_{1}^2}{r^3} =\frac{T_{2}^2}{(9r)^3}$

$T_{1}$ is the original period: 1 hour

$T_{2}$ is the period of the second satellite.

and $(9r)^3=729r^3$

thus:

$\frac{(1h)^2}{r^3} =\frac{T_{2}^2}{729r^3}$

Clearing for $T_{2}$

$\frac{(1h)^2}{r^3}(729r^3) ={T_{2}^2}$

$729=T_{2}^2$

$\sqrt{729}=T_{2}$

$27=T_{2}$

The period of the second satellite is 27 hours

6 0

3 years ago

What 2 elements on the periodic table are solid at room temperature?

shepuryov [24]

Answer:

Eleven non-metals are gases at room temperature, including oxygen and chlorine. One non-metal, bromine, is a liquid at room temperature. The other non-metals are solids at room temperature, including carbon and sulfur.

8 0

2 years ago

Read 2 more answers