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Vector 5

The document contains a series of physics questions related to forces, vectors, and motion. It includes multiple-choice questions about resultant forces, changes in velocity, displacement, vector products, and work done by forces. Each question presents options for answers, testing knowledge on vector relationships and mechanics.

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raghavmittal2507
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27 views4 pages

Vector 5

The document contains a series of physics questions related to forces, vectors, and motion. It includes multiple-choice questions about resultant forces, changes in velocity, displacement, vector products, and work done by forces. Each question presents options for answers, testing knowledge on vector relationships and mechanics.

Uploaded by

raghavmittal2507
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Two forces each of magnitude F have a

resultant of the same magnitude F. The angle


between the two forces is -
(A) 45º
(B) 120º
(C) 150º
(D) 60º
Q.17
A particle is moving on a circular path with
constant speed v. What is the change in its
velocity after it has described an angle of 60º ?
(A) v
(B) v
(C) v
(D) 2 v
Q.18* Which of the following sets of displacements
might be capable of returning a car to its
starting point ?
(A) 4, 6, 8 and 15 km
(B) 10, 30, 50 and 120 km
(C) 5,10, 30 and 50 km
(D) 50, 50, 75 and 200 km
Q.19
The magnitude of the vector product of two
vectors
and may be -
(a) Greater than AB
(b) Equal to AB
(c) Less than AB
(d) Equal to Zero
(A) a, b, c
(B) b, c, d
(C) a, c, d
(D) a, b, d
Q.20
Three vectors
A,B

and
C

satisfy the relation


= 0 and
= 0. The vector
A

is parallel
to -
(A)
(B)
(C)
(D)
Q.21
The angle between the two vectors
and
is -
(A) 0º
(B) 90º
(C) 180º
(D) None
Q.22
A body constrained to move in y direction is
subjected to a force given by
N. What is the work done
by this force in moving the body through a
distance of 10 m along y-axis ?
(A) 190 J
(B) 160 J
(C) 150 J
(D) 20 J
Q.23* What is the angle between
(P Q)

+
and
(P Q)

?
(A) 0
(B)
2

(C)
4

(D)
Q.24
A vector
points vertically upward and
points towards north. The vector product
is-
(A) along west
(B) along east
(C) zero
(D) vertically downward
Q.25
A vector is along the positive x-axis. If its
vector product with another vector
F2

is zero,
then
could be -
(A) 4
(B)
(C)
(D)
Q.26
For any two vectors
and
, if
, the magnitude of
is equal to -
(A)
A
2
+B
2
(B) A + B
(C)
(D)
A
2
+B
2
+ 2AB
Q.27
Which of the following is not true ? If
and
where A and B
are the magnitudes of
and ?
(A)
AB

=0
(B)
(C)
(D) A = 5
Q.28
A unit vector along the direction
has a
magnitude -
(A)
3
(B)
2
(C) 1
(D) 0
Q.29
If vectors A =
i
ˆ
+2+4
k
ˆ
and B = 5
i
ˆ
represent the two sides of a triangle, then the
third side of the triangle has length equal to -
(A)
56
(B)
21
(C) 5
(D) 6

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