# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 358 - 362 of 2184

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## Question number: 358

Edit
Assertion-Reason▾

### Assertion (Ꭺ)

If the net external force on the body is zero then its acceleration is zero.

### Reason (Ꭱ)

Acceleration does not depend on force.

### Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

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

c.

Both Ꭺ and Ꭱ are false

d.

Ꭺ is false but Ꭱ is true

## Question number: 359

Edit
MCQ▾

### Question

A particle of mass m slides down from the vertex of semi-hemisphere, without any initial velocity. At what height from horizontal will the particle leave the sphere-

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 360

Edit
MCQ▾

### Question

The total mass of an elevator with a 80 kg man in it is 1000 kg. This elevator moving upward with a speed of 8 m/sec, is brought to rest over a distance of 16m. The tension T in the cables supporting the elevator and the force exerted on the man by the elevator floor will respectively be

### Choices

Choice (4) Response

a.

624 N, 78 N

b.

624 N, 7800 N

c.

78 N, 624 N

d.

7800 N, 624 N

## Question number: 361

Edit
MCQ▾

### Question

If the earth is treated as a sphere of radius R and mass M. Its angular momentum about the axis of rotation with period T is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 362

Edit
MCQ▾

### Question

A uniform heavy disc is rotating at constant angular velocity about a vertical axis through its center and perpendicular to the plane of the disc. Let L be its angular momentum. A lump of plasticize is dropped vertically on the disc and sticks to it. Which of the following will be constant?

### Choices

Choice (4) Response

a.

a

b.

a and L

c.

L Only

d.

None of the above