Kinematics [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 65 - 68 of 475

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Question 65

Question 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.

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

b.

Both Ꭺ and Ꭱ are false

c.

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

d.

Ꭺ is true but Ꭱ is false

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Question 66

Question MCQ▾

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

Choices

Choice (4)Response

a.

6 - 2 + 3

b.

6 - 2 + 8

c.

-18 - 13 + 2

d.

4 - 13 + 6

Edit

Question 67

Question MCQ▾

As shown in figure the tension in the horizontal cord is 30 N. The weight Wand tension in the string OA in newton are

Tension on the Weight

In above fig we show that tension acting on the cube of weight w and and tension in horizontal cord is 30 N.

Choices

Choice (4)Response

a.

b.

c.

d.

Question does not provide sufficient data or is vague

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Question 68

Question MCQ▾

A force (where K is a positive constant) acts on a particle moving in the x-y plane. Starting from the origin, the particle is taken along the positive x-axis to the point (a, 0) and then parallel to the y-axis to the point

(a, a) . The total work done by the forces F on the particle is

Choices

Choice (4)Response

a.

Ka2

b.

-Ka2

c.

2Ka2

d.

-2Ka2

Edit