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GREYUIT [131]
3 years ago
6

Which vector below goes from (0,0) to (-2,4)?A. cB. aC. bD. d​

Physics
1 answer:
Yuri [45]3 years ago
3 0

Answer:

I believe it is A.c

Explanation:

hope its right

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Your friend's 10.8 g graduation tassel hangs on a string from his rearview mirror. When he accelerates from a stoplight, the tas
Nitella [24]

The tension in the string holding the tassel and the vertical will the tension in the string

  • T = 0.1953 N
  • Ф = 34.4 °

<h3>What is the tension in the string holding the tassel. ?</h3>

Generally, the equation for Tension is  mathematically given as

TCos\theta = mg

Therefore

TCos6.58^{o} = 19.8*10^{-3}*9.8

T = 0.1953 N

b).

Where

T* sin \theta = ma

0.1953*Sin6.58 \textdegree  = 19.8*10^{-3}*a

a = 1.13 m/s^2

In conclusion

T* sinФ = ma

2msinФ = ma

2sinФ = a

sin\theta = \frac{a}{2}

\theta = sin^{-1}\frac{a}{2} \\\\\theta= sin^{-1}\frac{1.13}{2}

Ф = 34.4 °

In conclusion, The tension in the string holding the tassel and the vertical will the tension in the string

T = 0.1953 N

Ф = 34.4 °

Read more about tension

brainly.com/question/15880959

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4 0
2 years ago
which of the following statements is a reasonable conclusion about the Arctic ecosystem? a)The number of offspring produced is a
Vitek1552 [10]

Answer:

A is the answer

Explanation:

6 0
3 years ago
Guys this is urgent and I don’t know please help me I will mark brainliest!
VLD [36.1K]

Answer:

Not acted upon there is no motion

Forces acted upon there is motion

You can refer to the definition stated below:

Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This is normally taken as the definition of inertia. ... If that velocity is zero, then the object remains at rest.

8 0
3 years ago
An astronaut goes out for a space-walk at a distance above the earth equal to the radius of the earth. What is her acceleration
Lera25 [3.4K]

Answer:\frac{g}{4}

Explanation:

Let m be the mass of Astronaut

M=mass of earth

G=Gravitational constant

R=radius of Earth

Force Exerted by Earth on Astronaut

F=\frac{GmM}{R^2}

acceleration due to gravity is =\frac{F}{m}=g

g=\frac{GM}{R^2}

When it is at r=2R

g'=\frac{GM}{(2R)^2}

g'=\frac{GM}{4R^2}=\frac{g}{4}  

7 0
3 years ago
A tennis player practices against a wall, hitting a 0.1 kg ball towards the
pantera1 [17]

Answer: 80 Newton

Explanation:

Initial velocity of ball = +20 m/s.

Final velocity of ball = -20 m/s

Mass of ball = 0.1kg

Time taken = 0.05 seconds

Average force = (Change in momentum of moving ball / Time taken)

Since, change in momentum = Mass (final velocity - initial velocity)

Change in momentum =0.1 x (-20 - (+20))

= 0.1 x (-20-20)

= 0.1 x (-40)

= -4.0 kgm/s

Then, put -4.0 kgm/s in the equation of force when Average Force = (Change in momentum / Time taken)

= (-4.0kgm/s / 0.05 seconds)

= 80Newton (note that the negative sign does not reflect on the magnitude of force)

Thus, the average force exerted on the ball is 80N

3 0
3 years ago
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