Rotational Motion (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 91 - 94 of 125

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Question number: 91

» Rotational Motion » Concepts of Rotational Motion

MCQ▾

Question

A disc is rolling (without slipping) on a horizontal surface. C is its centre and Q and P are two points equidistant from C. Let V P, V Q and V C be the magnitude of velocities of points P, Q and C respectively, then

Disc rolling on a horizontal surface point P and Q.

Disc Rolling on a Horizontal Surface Point P and Q.

In above figure we shows that disc is rolling on a horizontal surface, C is center of P and Q point.

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 92

» Rotational Motion » Moment of Inertia

MCQ▾

Question

From a uniform wire, two circular loops are made (i) P of radius r and (ii) Q of radius nr. If the moment of inertia of loop Q about an axis passing through its center and perpendicular to its plane is 125 times that of P about a similar axis, the value of n is (diameter of the wire is very much smaller than r or nr)

Choices

Choice (4) Response

a.

2

b.

5

c.

6

d.

3

Question number: 93

» Rotational Motion » Angular Momentum

MCQ▾

Question

A uniform rod of length 4L is placed with one end in contact with the horizontal and is then inclined at an angle 60 0 to the horizontal and allowed to fall without slipping at contact point. When it becomes horizontal, its angular velocity will be

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 94

» Rotational Motion » Rotational Kinetic Energy

MCQ▾

Question

Two disc, each having moment of inertia 5 kg m 2 about its central axis, rotating with speeds 10 rad s -1 and 20 rad s -1, are brought in contact face with their axes of the rotation coincided. The loss of kinetic energy in the process is,

Choices

Choice (4) Response

a.

125 J

b.

5 J

c.

0 J

d.

2 J

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