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melisa1 [442]
3 years ago
15

Number 13 please!!!!!!!!!!!

Physics
1 answer:
atroni [7]3 years ago
4 0
'A' and 'C' both show that behavior.

'D' also shows it, but the object is moving backwards when time begins.
First it moves faster and faster backwards, then it moves slower and slower backwards.
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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

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2 years ago
A cave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. The lift i
bija089 [108]

Answer

Mass m = 78 kg

Vertical height in each stage h = 11 m

(a).

Initial speed u = 0

Final speed v = 1.1 m / s

v^2=u^2 + 2 as

1.1^2 = 2 a \times 11

a = 0.055 m/s²

Work done

W_a= m g h + \dfrac{1}{2}mv^2

W_a= 78\times 9.8 \times 11 + \dfrac{1}{2} 78 \times 1.1^2

W_a = 8408.4 + 47.19

W_a = 8455.59 J

(b).Work done

W_b= mgh

W_b = 78× 9.8× 11

W_b= 8408.4 J

c)

Work done

W= m g h + \dfrac{1}{2}m(v_f-v_i)^2

Where V = final speed

               = 0

            v = 1.1 m / s

for deceleration a = -0.055 m/s²

now,

F_L = 56 (-0.055+9.8) = 545.72 N

W_c = 545.75 × 11

W_c = 6003.25 J

   

7 0
3 years ago
Which of the following is NOT a type of scientist?
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Cryptologist is not a scientist.
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Which of the following most likely happens when the temperature of a chemical reaction is increased?
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6 0
3 years ago
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