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ফুড ইঞ্জিনিয়ারিং

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1801. MCQPractice set · Question 61

একটি 1 kg body 8 m/s east এবং 3 kg body 2 m/s west; stick করলে final velocity কী?

a.
0.5 m/s west
b.
0.5 m/s east
c.
2 m/s west
d.
1 m/s east

Correct answer: b

Net momentum 2 kg·m/s east; total mass 4 kg, v=0.5 m/s east।

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1802. MCQPractice set · Question 62

Perfectly inelastic collision-এ total mass কী?

a.
দুই mass-এর sum
b.
difference
c.
product
d.
zero

Correct answer: a

দুই body stick করলেও mass conserved থাকে।

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1803. MCQPractice set · Question 63

Collision-এ momentum conserved হলেও kinetic energy কমলে lost energy কোথায় যেতে পারে?

a.
heat, sound ও deformation
b.
কোনো জায়গায় নয়
c.
mass-এ
d.
momentum-এ

Correct answer: a

Inelastic deformation ও sound/heat-এ kinetic energy রূপান্তরিত হয়।

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1804. MCQPractice set · Question 64

Elastic collision-এ relative speed of separation ও approach-এর relation কী?

a.
সমান
b.
separation zero
c.
approach zero
d.
separation দ্বিগুণ

Correct answer: a

Perfectly elastic collision-এ e=1।

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1805. MCQPractice set · Question 65

একটি 2 kg body 5 m/s east-এ; external impulse 6 N·s west হলে final momentum কত?

a.
4 east
b.
16 east
c.
10 west
d.
0

Correct answer: a

Initial p=10 east; west impulse 6 subtract করলে final p=4 east।

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1806. MCQPractice set · Question 66

একটি body-এর initial momentum 12 এবং impulse −20 হলে final momentum কত?

a.
−8
b.
8
c.
32
d.
20

Correct answer: a

p_f=p_i+J=12−20=−8 kg·m/s।

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1807. MCQPractice set · Question 67

Force-time graph triangular, base 4 s ও height 10 N হলে impulse কত?

a.
10 N·s
b.
20 N·s
c.
40 N·s
d.
5 N·s

Correct answer: b

Triangle area=½×4×10=20 N·s।

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1808. MCQPractice set · Question 68

Force-time graph rectangular, force 8 N ও time 3 s হলে impulse কত?

a.
11 N·s
b.
24 N·s
c.
64 N·s
d.
2.67 N·s

Correct answer: b

Area=FΔt=8×3=24 N·s।

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1809. MCQPractice set · Question 69

COM-এর position দুই equal mass-এর ক্ষেত্রে কীভাবে পাওয়া যায়?

a.
midpoint
b.
বড় coordinate-এর দ্বিগুণ
c.
origin সবসময়
d.
mass product

Correct answer: a

Equal weights-এর average position midpoint।

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1810. MCQPractice set · Question 70

দুই mass 1 kg at x=0 ও 3 kg at x=4 m হলে COM x কত?

a.
1 m
b.
2 m
c.
3 m
d.
4 m

Correct answer: c

x_COM=(1×0+3×4)/4=3 m।

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