Laws of Motion [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 39 - 42 of 244
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Question 39
Question MCQ▾
A particle of mass 3 kg is moving under the action of a central force whose potential energy is given by U (r) = 10r3 joule. For what energy and angular momentum will the orbit be a circle of radius 10 m?
Choices
Choice (4) | Response | |
---|---|---|
a. | 2.5 × 104 J, 3000 kgm2 /sec | |
b. | 2.5 × 103 I, 300 kgm2 /sec | |
c. | 3.5 × 104 I, 2000 kgm2 /sec | |
d. | 3.5 × 103 J, 300 kgm2 /sec |
Question 40
Question MCQ▾
In figure ABCDE is a channel in the vertical plane, part BCDE being circular with radius r. A ball is released from A and slides without friction and without rolling. It vr ″ - complete the loop path when
Choices
Choice (4) | Response | |
---|---|---|
a. | h > 5r/2 | |
b. | h < 2r/5 | |
c. | h < 5 r/2 | |
d. | h > 2r/5 |
Question 41
Question MCQ▾
A boat of mass 1000 kg is moving with a velocity of 8 m/s. A person of mass 70 kg jumps into the boat. The velocity of the boat with the person will be –
Choices
Choice (4) | Response | |
---|---|---|
a. | 7.71 cm/s | |
b. | 74.8 m/s | |
c. | 7.48 m/s | |
d. | 77.1 cm/s |
Question 42
Question MCQ▾
A string of length L is fixed at one end and carries a mass M at the other end. The string makes 2/tc revolutions per second around the vertical axis through the fixed end as Shown in the figure, then tension in the string is
Choices
Choice (4) | Response | |
---|---|---|
a. | 16 ML | |
b. | 5ML | |
c. | 4 ML | |
d. | 2 ML |