# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 136 - 142 of 2320

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## Question number: 136

» Kinematics » Scalars and Vectors » Scalar and Vector Products

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MCQ▾

### Question

the vector P = ai + aj + 3k and Q = ai - 2j - k are perpendicular to each other. The positive value of a is

### Choices

Choice (4)Response

a.

3

b.

13

c.

9

d.

4

## Question number: 137

» Kinematics » Scalars and Vectors » Scalar and Vector Products

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MCQ▾

### Question

A particle moves from position 3i + 2j-6k to 14i + 13j + 9k due to a uniform force of (4i + j + 3k) N. If the displacement in metres then work done will be

### Choices

Choice (4)Response

a.

200 J

b.

300 J

c.

100 J

d.

250 J

## Question number: 138

» Kinematics » Scalars and Vectors » Scalar and Vector Products

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MCQ▾

### Question

If|AxB|=| A. B|, then angle between A and S will be

### Choices

Choice (4)Response

a.

30

b.

45°

c.

60°

d.

All of the above

## Passage

A particle moves along x-axis and its acceleration at any time t is a = 2 sin (πt), where t is in seconds and a is in m/s 2. The initial velocity of particle (at time t = 0) is u = 0.

## Question number: 139 (1 of 3 Based on Passage) Show Passage

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MCQ▾

### Question

The distance travelled (in meters) by the particle from time t = 0 to t = t will be –

### Choices

Choice (4)Response

a.

- +

b.

c.

-

d.

All of the above

## Question number: 140 (2 of 3 Based on Passage) Show Passage

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MCQ▾

### Question

the distance travelled (in meters) by the particle from time to t = 0 to t = 1 is will be-

### Choices

Choice (4)Response

a.

4/π

b.

1/π

c.

2/π

d.

None of the above

## Question number: 141 (3 of 3 Based on Passage) Show Passage

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MCQ▾

### Question

The magnitude of displacement (in meters) by the particle from time t = 0 to t = t will be –

### Choices

Choice (4)Response

a.

-

b.

- +

c.

d.

All of the above

## Question number: 142

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MCQ▾

### Question

A ball is fixed to the end of a string and is rotated in a horizontal circle of radius 10 m with a speed of 20 m/sec. The acceleration of the ball will be -

### Choices

Choice (4)Response

a.

20 m/s 2

b.

30 m/s 2

c.

40 m/s 2

d.

10 m/s 2

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