The resultant of two equal forces P making an angle $$\theta ,$$ is given by

If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is

A

30°

B

60°

C

90°

D

120°

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°

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°

B

45°

C

65°

D

120°

The resultant of two forces P and Q acting at an angle $$\theta $$ is

A

$$\sqrt {{{\text{P}}^2} + {{\text{Q}}^2} + 2{\text{PQ}}\sin \theta } $$

B

$$\sqrt {{{\text{P}}^2} + {{\text{Q}}^2} + 2{\text{PQ}}\cos \theta } $$

C

$$\sqrt {{{\text{P}}^2} + {{\text{Q}}^2} - 2{\text{PQ}}\cos \theta } $$

D

$$\sqrt {{{\text{P}}^2} + {{\text{Q}}^2} - 2{\text{PQ}}\tan \theta } $$

If a number of forces are acting at a point, their resultant will be inclined at an angle $$\theta $$ with the horizontal, such that

A

$$\tan \theta = \frac{{\sum {\text{H}} }}{{\sum {\text{V}} }}$$

B

$$\tan \theta = \frac{{\sum {\text{V}} }}{{\sum {\text{H}} }}$$

C

$$\tan \theta = \sum {{\text{V}} \times \sum {\text{H}} } $$

D

$$\tan \theta = \sqrt {\sum {{\text{V}} + \sum {\text{H}} } } $$

If the resultant of two forces has the same magnitude as either of the force, then the angle between the two forces is

A

30°

B

45°

C

60°

D

120°

The resultant of two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then,

A

P = R

B

Q = R

C

P = Q

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

B

Q = R

C

Q = 2R

D

None of these

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

B

Q = R

C

Q = 2R

D

Q = 3R

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

B

Its shorter side

C

The diagonal of the parallelogram which does not pass through the point of intersection of the forces

D

The diagonal of the parallelogram which passes through the point of intersection of the forces

The resultant of two equal forces P making an angle $$\theta ,$$ is given by

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