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টেক্সটাইল ইঞ্জিনিয়ারিং

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1221. MCQPractice set · Question 24

f=5 Hz হলে angular velocity কত?

a.
5π rad/s
b.
10π rad/s
c.
π/5 rad/s
d.
25π rad/s

Correct answer: b

ω=2πf=10π rad/s।

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1222. MCQPractice set · Question 25

একটি wheel 10 s-এ 50 revolution করলে frequency কত?

a.
2 Hz
b.
5 Hz
c.
10 Hz
d.
50 Hz

Correct answer: b

f=number/time=50/10=5 Hz।

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1223. MCQPractice set · Question 26

একটি wheel 10 s-এ 50 revolution করলে angular velocity কত?

a.
5π rad/s
b.
10π rad/s
c.
20π rad/s
d.
50π rad/s

Correct answer: b

f=5 Hz, তাই ω=2π×5=10π rad/s।

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1224. MCQPractice set · Question 27

একটি point radius 0.5 m এবং ω=4 rad/s হলে linear speed কত?

a.
1 m/s
b.
2 m/s
c.
4.5 m/s
d.
8 m/s

Correct answer: b

v=rω=0.5×4=2 m/s।

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1225. MCQPractice set · Question 28

r=2 m এবং ω=3 rad/s হলে tangential speed কত?

a.
1.5 m/s
b.
5 m/s
c.
6 m/s
d.
9 m/s

Correct answer: c

v=rω=2×3=6 m/s।

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1226. MCQPractice set · Question 29

v=10 m/s এবং r=2 m হলে angular velocity কত?

a.
2 rad/s
b.
5 rad/s
c.
10 rad/s
d.
20 rad/s

Correct answer: b

ω=v/r=10/2=5 rad/s।

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1227. MCQPractice set · Question 30

Angular displacement θ এবং arc length s-এর relation কী?

a.
s=rθ
b.
s=θ/r
c.
s=r/θ
d.
s=r+θ

Correct answer: a

Radian definition অনুযায়ী arc length s=rθ।

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1228. MCQPractice set · Question 31

একটি circle-এ r=2 m এবং θ=3 rad হলে arc length কত?

a.
1.5 m
b.
5 m
c.
6 m
d.
9 m

Correct answer: c

s=rθ=2×3=6 m।

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1229. MCQPractice set · Question 32

Arc length s এবং angular velocity-এর relation কী?

a.
linear speed v=rω
b.
v=ω/r
c.
v=r+ω
d.
v=ω²r

Correct answer: a

s=rθ উভয় পাশে time derivative নিলে v=rω।

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1230. MCQPractice set · Question 33

Angular displacement-এর rate of change কী?

a.
linear speed
b.
angular velocity
c.
angular acceleration
d.
centripetal force

Correct answer: b

ω=dθ/dt।

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