Two forces of magnitude 3m and 2m respectively have a resultant R. if the first force is doubled, the magnitude of the resultant is doubled.Find the angle betuween forces?

A 90°
B 120°
C 135°
D 145°

Correct Answer: 120°

Bissoy MCQ
#উচ্চতর গণিত #বিপরীত ত্রিকোণমিতিক ফাংশন ও ত্রিকোণমিতিক সমীকরণ (Inverse Trigonometric Functions and Trigonometric Equations) #B2-ইউনিট #জাহাঙ্গীরনগর বিশ্ববিদ্যালয়

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3N ও 2N মানের দুইটি বলের লদ্ধি R । প্রথম বলের মান দ্বিগুণ করলে লদ্ধির মানও দ্বিগুণ হয়। বলদ্বয়ের মধ্যবর্তী কোণের মান হবে- (The resultant of two forces 3N and 2N is R. If the first force is doubled then the resultant is also doubled. The angle between the forces is-)
A 30°
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If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is
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If the resultant of two forces has the same magnitude as either of the force, then the angle between the two forces is
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Parallelogram Law of Forces states, "if two forces acting simultaneously on a particle be represented in magnitude and direction by two adjacent sides of a parallelogram, their resultant may be represented in magnitude and direction by
A Its longer side
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D The diagonal of the parallelogram which passes through the point of intersection of the forces
The resultant of two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then,
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D None of the above is correct
The resultant of the two forces ‘P’ and ‘Q’ is ‘R’. If ‘Q’ is doubled, the new resultant is perpendicular to ‘P’. Then
A P = Q
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The resultant of the two forces P & Q is R. If Q is doubled, the new resultant is perpendicular to P. Then
A P = Q
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If two forces each equal to ‘T’ in magnitude act at right angles, their effect may be neutralized by a third force acting along their bisector in opposite direction whose magnitude will be
A 2T
B $$\frac{1}{2}{\text{T}}$$
C $$\sqrt 2 {\text{ T}}$$
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কোন একটি বিন্দুতে ক্রিয়ারত p→ ও 2p→ বলদ্বয়ের লব্ধি 7p→ হলে তাদের মধ্যবর্বরটি কোণ কত? (If two forces p→ and 2p→ acted on a point and their resultant force is 7p→, what is the angle between them?)
A 180°
B 90°
C 60°
D 30°
কোন একটি বিন্দুতে ক্রিয়ারত P→ ও 2P→ বলদ্বয়ের লব্ধি 7P→ হলে তাদের মধ্যবর্তী কোণ কত? ( If two forces P→ and 2P→ acted on a point and their resultant force is 7P→, what is the angle between them?)
A 180∘
B 90∘
C 60∘
D 30∘

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