KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Physics: Questions 123 - 126 of 253

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Question number: 123

» Rotational Motion » Concepts of Rotational Motion

MCQ▾

Question

A rope is wound around a hollow cylinder of mass 4.2 kg and radius 0.7 m. Calculate the angular acceleration of the cylinder, if the rope gets pulled with a force of 46 N. Also, find the linear acceleration of the rope.

Choices

Choice (4) Response

a.

9.546

b.

8.756

c.

10.948

d.

Question does not provide sufficient data or is vague

Question number: 124

» Rotational Motion » Radius of Gyration

MCQ▾

Question

Radius of gyration of a body about an axis at a distance of 5 cm from its centre of mass is 15 cm. The radius of gyration about a parallel axis passing through its centre of mass is:

Choices

Choice (4) Response

a.

14.14 cm

b.

13.95 cm

c.

15.25 cm

d.

14.35 cm

Question number: 125

» Rotational Motion » Angular Momentum

MCQ▾

Question

Four balls A, B, C, D of mass 2kg, 6kg, 7kg, 9 kg, respectively are oscillating in turn on a spring of force constant 80 Nm-1. Deduce the angular frequencies of balls are , than,

Choices

Choice (4) Response

a.

b.

c.

d.

None of the above

Question number: 126

» Physics and Measurement » Errors in Measurement

MCQ▾

Question

In an experiment, mass of an object is measured by applying a known force on it, and then measuring its acceleration. If, in the experiment, the measured values of applied force and the measured acceleration are and , respectively, the mass of the object is – (2015)

Choices

Choice (4) Response

a.

b.

c.

d.

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