# NEET Physics: Questions 135 - 140 of 2142

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## Question number: 135

» Kinematics » Scalars and Vectors » Scalar and Vector Products

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.

4

b.

9

c.

3

d.

13

## Question number: 136

» Kinematics » Scalars and Vectors » Scalar and Vector Products

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.

250 J

b.

300 J

c.

100 J

d.

200 J

## Question number: 137

» Kinematics » Scalars and Vectors » Scalar and Vector Products

MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

30

b.

60°

c.

45°

d.

None 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: 138 (1 of 3 Based on Passage) Show Passage

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.

2/π

c.

1/π

d.

None of the above

## Question number: 139 (2 of 3 Based on Passage) Show Passage

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.

None of the above

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

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

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