Physics 9th Chap 1 Topic 10(Vector At right angled)

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Physics Chapter 1 (Topic 10 : Vector at right angled)

Determine, by calculation or graphically, the resultant of two
vectors at right angles?

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When two vectors act at right angles, the resultant is found using:

A) Multiplication rule

B) Pythagoras theorem

C) Subtraction of magnitudes

D) Addition of magnitudes directly

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If two vectors 3 N and 4 N act at right angles, the resultant is:

A) 1 N

B) 12 N

C) 5 N

D) 7 N

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The angle between two perpendicular vectors is:

A) 0°

B) 180°

C) 90°

D) 45°

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A 6 N force east and 8 N force north act together. Resultant is:

A) 14 N

B) 2 N

C) 48 N

D) 10 N

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Which method is used to represent vector addition graphically?

A) Line graph method

B) Bar graph method

C) Head-to-tail method

D) Histogram method

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In graphical method, resultant vector is drawn from:

A) Tail to tail

B) Midpoint of both vectors

C) Head to head

D) Tail of first vector to head of second

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If two equal vectors act at right angles, resultant is:

A) Equal to one vector

B) Double of vector

C) Zero

D) × vector

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A 5 N force east and 12 N force north act together. Resultant is:

A) 17 N

B) 7 N

C) 60 N

D) 13 N

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The resultant of two perpendicular vectors is always:

A) Equal to one vector

B) Greater than either vector

C) Zero

D) Less than both vectors

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If resultant of 3 N and 4 N vectors is 5 N, the angle between them is:

A) 180°

B) 90°

C) 45°

D) 0°

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Which is correct for right-angle vector addition?

A) Direct multiplication

B) Algebraic addition

C) Vector triangle method

D) Scalar subtraction

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A vector diagram shows two perpendicular arrows. What shape do they form?

A) Rectangle

B) Right triangle

C) Straight line

D) Circle

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If one vector is 0, resultant of perpendicular vectors is:

A) Zero

B) Sum of both vectors

C) Equal to other vector

D) Always infinite

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A 9 N and 12 N force act at right angles. Resultant is:

A) 15 N

B) 108 N

C) 3 N

D) 21 N

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In vector addition, direction of resultant is found using:

A) Ohm’s law

B) Pythagoras theorem only

C) Trigonometry (tan θ)

D) Newton’s law

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The resultant vector direction depends on:

A) Mass only

B) Both magnitudes and angle

C) Only magnitude of one vector

D) Time only

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Which formula is correct for right-angle resultant?

A) R = A + B

B) R =

C) R = AB

D) R = A - B

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If resultant is 0, vectors must be:

A) Perpendicular and equal

B) Perpendicular and unequal

C) Parallel and equal opposite

D) Same direction

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Which quantity can be solved using vector addition at right angles?

A) Mass

B) Temperature

C) Energy

D) Displacement

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A boat moves 4 m east and 3 m north. Resultant displacement is:

A) 5 m

B) 12 m

C) 1 m

D) 7 m

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Which method gives both magnitude and direction of resultant?

A) Scalar method

B) Subtraction method

C) Graphical method

D) Algebraic method

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Why is Pythagoras theorem used here?

A) Vectors are perpendicular

B) Vectors are parallel

C) Vectors are zero

D) Vectors are scalar

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If vectors are perpendicular, cosine rule becomes:

A) R = AB

B) R = A - B

C) R = A + B

D) R² = A² + B²

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Which is a real-life example of perpendicular vectors?

A) Wind blowing straight

B) Resting object

C) Walking north and east simultaneously

D) Falling object vertically

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In graphical method, accuracy depends on:

A) Color of diagram

B) Scale chosen

C) Mass used

D) Time taken

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If vectors are 0° apart, resultant is:

A) Product

B) Sum

C) Difference

D) Zero

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If vectors are 180° apart, resultant is:

A) Sum

B) Zero always

C) Difference

D) Product

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Which statement is correct?

A) Right-angle vectors cancel each other

B) Right-angle vectors use Pythagoras theorem

C) Right-angle vectors use algebraic addition

D) Right-angle vectors are scalar

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Resultant of perpendicular vectors is always:

A) Equal to sum

B) Smaller than both

C) Always zero

D) Between larger and smaller magnitude

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Which is correct representation in graph?

A) Right triangle

B) Circle

C) Curve

D) Straight line

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If 8 N and 15 N are perpendicular, resultant is:

A) 120 N

B) 17 N

C) 23 N

D) 7 N

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Which is NOT needed in vector graphical method?

A) Direction

B) Mass

C) Scale

D) Arrow

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Direction of resultant is found using:

A) Subtraction

B) Addition

C) Pythagoras

D) Trigonometry

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Why is vector addition important in physics?

A) It avoids units

B) It removes direction

C) It combines directional quantities

D) It simplifies scalar values

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Which is correct conclusion?

A) Vectors ignore direction

B) Right-angle vectors require geometry

C) Vectors are always zero

D) Vector addition is same as scalar addition

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