Rotational Motion (NEET Physics): Questions 85 - 90 of 125

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Question number: 85

» Rotational Motion » Radius of Gyration

MCQ▾

Question

The radius of gyration of a disc of mass 200 g and radius 3.2 cm, about an axis passing through its center of gravity and perpendicular to the plane is

Choices

Choice (4) Response

a.

2.54 cm

b.

1.06 cm

c.

0.54 cm

d.

2.26 cm

Question number: 86

» Rotational Motion » Rigid Body Rotation Equations of Rotational Motion

MCQ▾

Question

A wheel has a speed of 1200 revolutions per minute and is made to slow down at a rate of 4 rad /s 2. The number of revolutions is makes before coming to rest is,

Choices

Choice (4) Response

a.

272

b.

314

c.

143

d.

722

Question number: 87

» Rotational Motion » Moment of Inertia

MCQ▾

Question

Moment of inertia of a disc about its own axis is I. its moment of inertia about a tangential axis in its plane is

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 88

» Rotational Motion » Values of Moments of Inertia

MCQ▾

Question

A constant torque of 3.6 N-m is exerted on a pivoted wheel. If angular acceleration of wheel is rad/sec 2, then the moment of inertia of the wheel is

Choices

Choice (4) Response

a.

2.5 kg-m 2

b.

1.21 kg-m 2

c.

0.6 kg-m 2

d.

2.5 kg-m 3

Question number: 89

» Rotational Motion » Angular Momentum

MCQ▾

Question

An inclined plane makes an angle 45° with the horizontal. A solid sphere rolling down this inclined plane from rest without slipping has a linear acceleration equal to,

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 90

» Rotational Motion » Moment of Inertia

MCQ▾

Question

Four thin rods of same mass M and same length l form a square as shown in figure. Moment of inertia of this system about an axis through center O and perpendicular to its plane is,

Arrangement of four rod - mass M and same length l

Arrangement of Four Rod - Mass M and Same Length L

In above fig we shows four thin rods of same mass M and same length l, form a square

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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