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 |
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 |
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
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 |
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 |