KinematicsScalars and Vectors (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 8  12 of 15
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Question number: 8
» Kinematics » Scalars and Vectors » Scalar and Vector Products
Assertion (Ꭺ)
The sum of two vectors can be zero.
Reason (Ꭱ)
Two vectors cancel each other, when they are equal and opposite.
Choices
Choice (4)  Response  

a.  Ꭺ is false but Ꭱ is true 

b.  Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ 

c.  Ꭺ is true but Ꭱ is false 

d.  Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ 

Question number: 9
» Kinematics » Scalars and Vectors » Scalar and Vector Products
Question
What is the value of linear velocity, if co = 3i 4j + k and r = 5i  6j + 6k
Choices
Choice (4)  Response  

a.  18  13 + 2 

b.  6  2 + 8 

c.  4  13 + 6 

d.  6  2 + 3 

Question number: 10
» Kinematics » Scalars and Vectors » Scalar and Vector Products
Assertion (Ꭺ)
IfA + B= AB , then angle between A and B is 90°
Reason (Ꭱ)
A + B = B + A
Choices
Choice (4)  Response  

a.  Both Ꭺ and Ꭱ are false 

b.  Ꭺ is false but Ꭱ is true 

c.  Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ 

d.  Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ 

Question number: 11
» Kinematics » Scalars and Vectors » Scalar and Vector Products
Question
The three vectors A = 3i  2j  k, B = i  3j + 5k and C = 2i  j  4k does not form
(1) an equilateral triangle
(2) isosceles triangle
(3) a right angled triangle
(4) no triangle
Choices
Choice (4)  Response  

a.  1 and 2 are correct 

b.  2 and 4 are correct 

c.  1,2 and 3 are correct 

d.  1 and 3 are correct 

Question number: 12
» Kinematics » Scalars and Vectors » Scalar and Vector Products
Question
A boy walks uniformly along the sides of a rectangular park of size 400 m x 300 m, starting from one corner to the other corner diagonally opposite. Which of the following statements is correct?
(1) He has travelled a distance of 700 m
(2) His displacement is 500 m
(3) His velocity is not uniform throughout the walk
(4) His displacement is 700 m
Choices
Choice (4)  Response  

a.  1 and 3 are correct 

b.  1,2 and 3 are correct 

c.  2 and 4 are correct 

d.  1 and 2 are correct 
