Let A = i Acosθ +j B sinθ be any vector.Another vector B which is normal to A is
Let A = i Acosθ +j B sinθ be any vector.Another vector B which is normal to A is
Options
(a) i B cosθ + i B sinθ (b) i B sinθ + j […]
Motion in Plane
If a vector 2i+3j+8k is perpendicular to the vector 4j-4i+αk, then value of α is
If a vector 2i+3j+8k is perpendicular to the vector 4j-4i+αk, then value of α is
Options
(a) -1 (b) 1/2 (c) -(1/2) (d) 1
Correct Answer:
-(1/2)
Explanation:
No explanation available. Be the first […]
If the angular momentum of any rotating body increase by 200 % , then the increase
If the angular momentum of any rotating body increase by 200%, then the increase in its kinetic energy
Options
(a) 400 % (b) 800 % (c) 200 % (d) 100 %
Correct Answer:
800 […]
A particle moves in xy plane according to the equation x = 4t² + 5t + 16 and y = 5t
A particle moves in xy plane according to the equation x = 4t² + 5t + 16 and y = 5t. The acceleration of the particle is
Options
(a) 8 (b) 13 (c) 14 […]
What will be the ratio of the distance moved by a freely falling body from rest in 4th
What will be the ratio of the distance moved by a freely falling body from rest in 4th and 5th seconds of journey?
Options
(a) 4 : 5 (b) 7 : 9 (c) 16 […]
The value of n so that vectors 2i+3j-2k, 5i+nj+k and -i+2j+3k may be coplanar,will be
The value of n so that vectors 2i+3j-2k, 5i+nj+k and -i+2j+3k may be coplanar,will be
Options
(a) 18 (b) 28 (c) 9 (d) 36
Correct Answer:
18
Explanation:
No explanation available. Be the first […]
If A=3i+4j and B=7i+24j the vector having the same magnitude as B and parallel to A is
If A=3i+4j and B=7i+24j the vector having the same magnitude as B and parallel to A is
Options
(a) 5i+20j (b) 15i+10j (c) 20i+15j (d) 15i+20j
Correct Answer:
15i+20j
Explanation:
No explanation available. Be […]
If two vectors 2i+3j+k and -4i-6j-λk are parallel to each other, then the value of λ is
If two vectors 2i+3j+k and -4i-6j-λk are parallel to each other, then the value of λ is
Options
(a) 0 (b) -2 (c) 3 (d) 4
Correct Answer:
-2
Explanation:
No explanation available. Be […]
At what angle should the two forces 2P and √2 P act,so that the resultant force is P√10?
At what angle should the two forces 2P and √2 P act,so that the resultant force is P√10?
Options
(a) 45ﾟ (b) 60ﾟ (c) 90ﾟ (d) 120ﾟ
Correct Answer:
45ﾟ
Explanation:
No explanation available. […]
Vectors A⃗, B⃗ and C⃗ are such that A⃗ . B⃗ = 0 and A⃗ . C⃗ = 0 Then the vector parallel
Vectors A⃗, B⃗ and C⃗ are such that A⃗ . B⃗ = 0 and A⃗ . C⃗ = 0 Then the vector parallel to A⃗ is
Options
(a) B⃗ and C⃗ (b) A⃗ x […]