# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 121 - 125 of 2184

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## Question number: 121

Edit
MCQ▾

### Question

A particle moves towards east with velocity 5 m/s. After 10 seconds its direction changes towards north with same velocity. The average acceleration of the particle is

### Choices

Choice (4) Response

a.

m/s 2 S-W

b.

zero

c.

m/s 2 N-W

d.

m/s 2 N-E

## Question number: 122

Edit
MCQ▾

### Question

A 120 m long train is moving towards west with a speed of 10 m/s. A bird flying towards east with a speed of 5 m/s crosses the train. The time taken by the bird to cross the train will be

### Choices

Choice (4) Response

a.

8 sec

b.

16 sec

c.

14 sec

d.

12 sec

## Question number: 123

Edit
MCQ▾

### Question

P, Q and R are three coplanar forces acting at a point and are in equilibrium. Given P = 1.9318 kg wt, sin Q = 0.9659, the value of R is (in kg wt)

### Choices

Choice (4) Response

a.

1

b.

0.9659

c.

2

d.

0.5

## Question number: 124

» Kinematics » Scalars and Vectors » Scalar and Vector Products

Edit
Assertion-Reason▾

### Assertion (Ꭺ)

The sum of two vectors can be zero.

### Reason (Ꭱ)

Two vectors cancel each other, when they are equal and opposite.

### Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are false

c.

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

d.

Ꭺ is true but Ꭱ is false

## Question number: 125

» Kinematics » Scalars and Vectors » Scalar and Vector Products

Edit
MCQ▾

### Question

What is the value of linear velocity, if co = 3i -4j + k and r = 5i - 6j + 6k

### Choices

Choice (4) Response

a.

6 - 2 + 3

b.

6 - 2 + 8

c.

-18 - 13 + 2

d.

4 - 13 + 6