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Julli [10]
3 years ago
8

Please help me idk this

Mathematics
1 answer:
crimeas [40]3 years ago
6 0

Answer:

Step-by-step explanation:

picture wont load

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A 0. 0427 kg racquetball is moving 22. 3 m/s when it strikes a stationary box. The ball bounces back at 11. 5 m/s, while the box
andreyandreev [35.5K]

To solve the question we must know about the conservation of momentum.

<h2>Conservation of Momentum</h2>

According to the law of conservation of momentum, when two bodies collide with each other then their momentum is conserved if no external force acts on the system. therefore, the combined momentum of the two objects before collision will be equal to the combined momentum of the two objects after the collision.

the momentum of the two objects before the collision

                       = momentum of the two objects after the collision

The mass of the box is 0.30141 kg.

<h2>Explanation</h2>

Given to us

  • Mass of racquetball, m = 0.0427 kg,
  • Velocity of racquetball before Collision,  \bold{u_1} = 22.3 m/s,
  • Velocity of box before Collision,\bold{ u_2}  = 0 m/s,
  • Velocity of racquetball after Collision, \bold{v_1} = 11.5 m/s,
  • Velocity of box after Collision, \bold{v_2} = 1.53 m/s,

<h3>Assumption</h3>

Let the mass of the box be M.

<h3>Conservation Of Momentum</h3>

Momentum before collision = Momentum after collision

mu_1 + Mu_2 = mv_1 + Mv_2

given, the box was stationary before the collision,

mu_1 + Mu_2 = mv_1 + Mv_2\\\\&#10;mu_1 + 0 = mv_1 + Mv_2\\\\&#10;mu_1  - mv_1 = Mv_2\\\\&#10;M= \dfrac{mu_1  - mv_1}{v_2}

Substituting the values,

M= \dfrac{mu_1  - mv_1}{v_2}\\\\&#10;M = \dfrac{(0.0427 \times 22.3)  - (0.0427\times 11.5)}{1.53}\\\\&#10;M = 0.30141\ kg

Hence, the mass of the box is 0.30141 kg.

Learn more about Conservation of Momentum:

brainly.com/question/2141713

3 0
3 years ago
Someone please help me with this question ?
SIZIF [17.4K]
From SOH CAH TOA,
.. cos(22°) = x/11 . . . . . fill in given values for C = A/H
.. 11*cos(22°) = x . . . . . multiply by 11
.. 11*0.927184 = x . . . .use a calculator to find cos(22°)
.. 10.1990 = x . . . . . . . use a calculator to do the multiplication

x ≈ 10.2 . . . . . . . . . . . round to the nearest tenth
6 0
4 years ago
A woman is walking at the rate of 90 yards per minute. How fast is she going in feet per second?
motikmotik

Answer:

She is going at the rate of 4.5 feet per second.

Step-by-step explanation:

Given:

The rate of walking is 90 yards per minute.

Now, to find the rate in feet per second.

1 yard = 3 foot.

1 minute = 60 seconds.

So, first we find the rate of walking per second in yard = 90\div 60

Therefore by dividing we get = 1.5 yard

Now, we find the rate of walking per second in feet = 1.5\times 3

So, by multiplying we get = 4.5 feet

Therefore, she is going at the rate of 4.5 feet per second.

3 0
3 years ago
Nikki is participating in a charity walk this
aivan3 [116]

Answer:

8.5 hours

Step-by-step explanation:

We know that it takes Nikki 1 hour to walk 4.2 miles.

We need to figure out how long it will take her to walk 35.7 miles.

This is our expression; 35.7 ÷ 4.2.

Let's go ahead and divide these two numbers.

(35.7 ÷ 4.2) = 8.5

So It will take Nikki 8.5 hours to walk 35.7 miles.

Feel free to give brainliest.

Have an excellent day!

6 0
3 years ago
Which graph shows the solution set for<br> -4.42 (greater than / equal to) 1.6x-3.6?
Fed [463]

Answer:

the 3rd one

Step-by-step explanation:

4 0
3 years ago
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