Question

---(2.4
1. Choose the correct option.
i) The resultant of two forces 10 N and 15 N
acting along tx and - X-axes respectively,
iv) Find a vector which is paralle
and has a magnitude 10.
Ans:
v) Show that vectors a = 21
7=i+- zł are parallel.
3. Solve the following problems
---(2.50
--- (251
followin
i)
Determine axb, given
b=3i+5).
e
(A) 25 N along + x-axis
(B) 25 N along - x-axis
(C) S N along + x-axis
(D) 5 N along - x-axis
ii) For two vectors to be equal, they should
have the
(A) same magnitude
(B) same direction
(C) same magnitude and direction
(D) same magnitude but opposite direction
iii) The magnitude of scalar product of two
unit vectors perpendicular to each other is
(A) zero (B)1
(C)-1
(D) 2
iv) The magnitude of vector product of two
unit vectors making an angle of 60° with
each other is
(A) 1
(B)2
ii) Show that vectors a = 21-
b=31-6) + 2h and et
mutually perpendicular.
iii) Determine the vecto
v = 2i +3; -k and v2 =i
Ans:-​

Answer 1

Answer:

Solution. The resultant of two forces 10 N and 15 N acting along +x and - x-axes respectively, is 5 N along - x-axis.