Kinematics-Scalars and Vectors (NEET Physics): Questions 8 - 12 of 15

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Question number: 8

» Kinematics » Scalars and Vectors » Scalar and Vector Products

Assertion-Reason▾

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

MCQ▾

Question

What is the value of linear velocity, if co = 3i -4j + k and r = 5i - 6j + 6k

Choices

Choice (4) Response

a.

-18 i^ - 13 j^ + 2 k^

b.

6 i^ - 2 j^ + 8 k^

c.

4 i^ - 13 j^ + 6 k^

d.

6 i^ - 2 j^ + 3 k^

Question number: 10

» Kinematics » Scalars and Vectors » Scalar and Vector Products

Assertion-Reason▾

Assertion (Ꭺ)

If|A + B|=| A-B| , 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

MCQ▾

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

MCQ▾

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

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