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Kisachek [45]
3 years ago
14

WILL MARK BRAINLIST only if correct answer

Physics
1 answer:
TiliK225 [7]3 years ago
4 0

Answer:

i learn about this its Mechanical waves

Explanation:

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Two people are standing on a 2.50-m-long platform, one at each end. The platform floats parallel to the ground on a cushion of a
trasher [3.6K]

Answer:

The platform move before coming to rest again 0.045 m far

Explanation:

Given

Ball is in motion

M (Platform mass + 2 people mass)

V (recoil velocity of the platform)

m (ball mass)

v (velocity ball)

MV + mv = 0

Distance of the platform movement is

t (time that the ball is in the air)

x = Vt

t = \frac{L}{v - V}

Knowing the platform and the ball are moving while the ball is in the air

x = \frac{V}{v - V} * L

Also knowing that

\frac{V}{v} = \frac{-m}{M}

This way,

x = ((\frac{V}{v}) * L) / (1 - \frac{V}{v}) = -\frac{m*L}{M + m} = -\frac{3.63 kg * 2.50 m}{198 kg + 3.63 kg}  = -0.045 m

The minus sign means the displacement of the platform is in opposite direction to the displacement of the ball.

6 0
3 years ago
Can anyone explain how to do this to me? It is due tomorrow at 9:30am. Thanks.
Georgia [21]
The 102N acting on the ropes being pulled by eric and kim have some of that force acting horizontally, and some of it vertically. By visualizing it as a right angled triangle, with the hypotenuse the length of the diagonal force, and each side the length of the horizontal and vertical forces, you can use trigonometry to calculate the length of the vertical force. You are told that it is at an angle of 30 with the vertical rope, therefore you know the length of the hypotenuse, and the angle between it and the vertical force, so using trig: (vertical force=x)
x/102=cos(30)
x=102*cos(30)
x=88.33
Therefore the diagonal ropes give a vertical force of 88.33N, and the centre rope, as it acts vertically, gives a vertical force of all 102N. The total:
88.33*2+102=278.66N

I don't know if this is very clear, I hope its good enough to help. If you don't understand, just ask, and I can answer any questions!!! :)
3 0
3 years ago
Please help which one is correct
Natalija [7]

Answer:

option (i) is correct

Explanation:

as there is no air resistance, no force is acting on the object horizontally, but gravitational acceleration will obviously act, regardless of the air resistance... option (i) is correct

8 0
3 years ago
The _____ law of thermodynamics states that energy can't be created or destroyed. Two natural sources of energy on Earth are the
emmasim [6.3K]
<span>So we need to put in the correct words to fill in the blanks. The FIRST law of thermodynamics states that energy can't be created or destroyed. It is a formulation of the law of conservation of energy modified for thermodynemical systems. Two natural sources of energy on Earth are the solar and wind. Also geothermal energy and hydropower are natural sources of energy. </span>
5 0
3 years ago
Read 2 more answers
Please help, I need help with this test question
Arturiano [62]

I believe this is right-

for the first question, it should be fluffy

and for the second it should be spot

potential energy is unused

kinetic energy is being used

4 0
2 years ago
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