Rotational Motion-Angular Momentum (NEET Physics): Questions 7 - 11 of 29

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Passage

Consider a cylinder of mass M = 1kg and radius R = 1 m lying on a rough horizontal plane. It has a plank lying on its top as shown in the figure.

 Cylinder of mass 1kg on the sphere

Cylinder of Mass 1kg on the Sphere

In above figure cylinder of m = 1kg on the sphere of radius R.

A force F = 55 N is applied on the plank such that the plank moves and causes the cylinder to roll. The plank always remains horizontal. There is no slipping at any point of contact.

Question number: 7 (1 of 3 Based on Passage) Show Passage

» Rotational Motion » Angular Momentum

MCQ▾

Question

Find the value of frictional force at A

Choices

Choice (4) Response

a.

2.5 N

b.

7.5 N

c.

5.0 N

d.

None of the above

Question number: 8 (2 of 3 Based on Passage) Show Passage

» Rotational Motion » Angular Momentum

MCQ▾

Question

Calculate the acceleration of cylinder.

Choices

Choice (4) Response

a.

10 m/s 2

b.

5 m/s 2

c.

20 m/s 2

d.

Question does not provide sufficient data or is vague

Question number: 9 (3 of 3 Based on Passage) Show Passage

» Rotational Motion » Angular Momentum

MCQ▾

Question

Find the value of frictional force at B

Choices

Choice (4) Response

a.

5.0N

b.

2.5 N

c.

7.5 N

d.

None of the above

Question number: 10

» Rotational Motion » Angular Momentum

MCQ▾

Question

Two discs of moment of inertia 1 1 and I 2 and angular speeds 1 and 2 are rotating along collinear axes passing through their center of mass and perpendicular to their plane. If the two are made to rotate combined along the same axis the rotational KE of system will be

Choices

Choice (4) Response

a.

I1ω1+I2ω22(I1+I2)

b.

(I1ω1+I2ω2)22(I1+I2)

c.

(I1+I2)(ω1+ω2)22 v

d.

None of the above

Question number: 11

» Rotational Motion » Angular Momentum

MCQ▾

Question

Two uniforms discs of equal mass but unequal radii are mounted on fixed horizontal exiles. Light strings are wrapped on each of the discs. The strings are pulled by constant equal forces F for same amount of time as shown in the figure.

Disc I and Disc II and force applied to it

Disc I and Disc II and Force Applied to It

We show two uniform discs of equal mass but unequal radii

Angular momenta of discs are L 1 and L 2 and their kinetic energies are K 1 and K 2. Which of the following statements true

(1) L 1 = L 2

(2) L 1 < L 2

(3) K 1 > K 2

(4) K 1 = K 2

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1, 2 and 3 are correct

b.

2 and 4 are correct

c.

1 and 2 are correct

d.

1 and 3 are correct

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