# Rotational Motion-Concepts of Rotational Motion (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 5 - 6 of 6

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## Question number: 5

» Rotational Motion » Concepts of Rotational Motion

MCQ▾

### Question

A solid cylinder of mass M and radius R rolls without slipping down an inclined plane of length l and height h. What is the speed of its centre of mass when the cylinder reaches its bottom?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 6

» Rotational Motion » Concepts of Rotational Motion

Assertion-Reason▾

### Assertion (Ꭺ)

Two cylinders, one hollow (metal) and the other solid (wood) with the same mass and identical dimensions are simultaneously allowed to roll without slipping down an inclined plane from the same height. The hollow cylinder will reach the bottom of the inclined plane first.

### Reason (Ꭱ)

By the principle of conservation of energy. The total kinetic energies of both the cylinders are identical when they reach the bottom of the incline.

### Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Ꭺ is true but Ꭱ is false

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

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