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PRACTICE QUESTION BANK

টেক্সটাইল ইঞ্জিনিয়ারিং

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1451. MCQPractice set · Question 20

Upward speed u দিয়ে ছোড়া body-এর highest point-এ উঠতে time কত?

a.
u/g
b.
2u/g
c.
u²/g
d.
g/u

Correct answer: a

v=u−gt=0 থেকে t=u/g।

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1452. MCQPractice set · Question 21

একই level-এ ফিরে আসতে total time কত?

a.
u/g
b.
2u/g
c.
u²/(2g)
d.
g/u

Correct answer: b

Ascent ও descent time সমান, তাই total T=2u/g।

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1453. MCQPractice set · Question 22

u=20 m/s, g=10 হলে maximum height কত?

a.
10 m
b.
20 m
c.
40 m
d.
200 m

Correct answer: b

H=u²/(2g)=400/20=20 m।

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1454. MCQPractice set · Question 23

u=20 m/s, g=10 হলে highest point-এ উঠতে time কত?

a.
1 s
b.
2 s
c.
4 s
d.
20 s

Correct answer: b

t=u/g=20/10=2 s।

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1455. MCQPractice set · Question 24

u=20 m/s, g=10 হলে same level-এ ফিরতে time কত?

a.
1 s
b.
2 s
c.
4 s
d.
8 s

Correct answer: c

T=2u/g=40/10=4 s।

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1456. MCQPractice set · Question 25

একটি body upward 30 m/s speed-এ ছোড়া হলো, g=10। 2 s পরে velocity কত?

a.
10 m/s upward
b.
10 m/s downward
c.
20 m/s upward
d.
0

Correct answer: a

v=u−gt=30−20=10 m/s upward।

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1457. MCQPractice set · Question 26

একই body 2 s পরে height কত?

a.
20 m
b.
40 m
c.
60 m
d.
80 m

Correct answer: b

h=ut−½gt²=30×2−5×4=40 m।

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1458. MCQPractice set · Question 27

একটি body upward 30 m/s-এ ছোড়া হলে maximum height কত?

a.
30 m
b.
45 m
c.
60 m
d.
90 m

Correct answer: b

H=u²/(2g)=900/20=45 m।

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1459. MCQPractice set · Question 28

Free fall-এ successive seconds-এ distance ratio কী?

a.
1:2:3
b.
1:3:5
c.
1:4:9
d.
2:3:4

Correct answer: b

Rest থেকে nth second-এর distance sₙ=½g(2n−1), তাই 1:3:5।

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1460. MCQPractice set · Question 29

Rest থেকে free fall-এ প্রথম second-এ distance কত?

a.
g/2
b.
g
c.
2g
d.
g²/2

Correct answer: a

s₁=½g×1²=g/2।

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