NEET Physics: Questions 307 - 312 of 2099

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Question number: 307

» Laws of Motion » Momentum

Assertion-Reason▾

Assertion (Ꭺ)

The slope of momentum versus time graph! give us the acceleration.

Reason (Ꭱ)

Force is given by the rate of change on momentum.

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

Question number: 308

» Laws of Motion » Force and Inertia

MCQ▾

Question

The string of a pendulum is horizontal. The mass of the bob is m. Now the string is released. The tension in the string in the lowest position is –

Choices

Choice (4) Response
a.

1 mg

b.

2 mg

c.

3 mg

d.

4 mg

Passage

Read the passage given below and answer the questions that follows:

Three of the fundamental constants of physics are the universal gravitational constant, G = 6.7 x 10 Wkg-V2, the speed of light, c - 3.0 x 108 m/s, and Planck’s constant, ft = 6.6x 10 - 34 Js-1. Two particles A and B are projected in the vertical plane with same initial velocity u0 from part (0, 0) and (, -h) towards each other as shown in figure at t = 0.

Graph of projection of A and B particles

Graph of Projection of a and B Particles

Projection of two particle A & B in vertical plane

Question number: 309 (1 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

Minimum distance between particle A and B during motion will be-

Choices

Choice (4) Response
a.

l+h

b.

l2+h2

c.

l

d.

h

Question number: 310 (2 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

The time when separation between A and B is minimum is

Choices

Choice (4) Response
a.

l2u0cosθ

b.

2lu0cosθ

c.

2hg

d.

Xu0cosθ

Question number: 311 (3 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

The path of particle A with respect to particle B will be -

Choices

Choice (4) Response
a.

Straight line parallel to y-axis

b.

Straight line parallel to x-axis

c.

parabola

d. None of the above

Question number: 312

» Properties of Solids & Liquids » Terminal Velocity

MCQ▾

Question

If the terminal speed of a sphere of gold (density = 19.5 kg/m 3) is 0.2 m/s in a viscous liquid (density = 1.5 kg/m 3), find the terminal speed of a sphere of silver (density = 10.5 kg/m 3) of the same size in the same liquid

Choices

Choice (4) Response
a.

0.4 m/s

b.

0.1 m/s

c.

0.133 m/s

d.

0.2 m/s

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