# Kinematics (NEET Physics): Questions 54 - 59 of 233

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## Passage

When an airplane flies, its total velocity with respect to the ground is v total = v plane + v wind’ where v plane denotes the plane’s velocity through motionless air,

And v wind denotes the wind’s velocity. Crucially, all the quantities in this equation are vectors. The magnitude of a velocity vector is often called the “speed. ”

Consider an airplane whose speed through motionless air is 100 meters per second (m/s). To reach its destination, the plane must fly east.

The “heading” of a plane is in the direction in which the nose of the plane points. So, it is the direction in which the engines propel the plane.

## Question number: 54 (3 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

### Question

Let denote the answer of above question. The plane has what speed with respect to the ground?

### Choices

Choice (4) Response

a.

b.

(100 m/s)

c.

(100 m/s)

d.

## Question number: 55

» Kinematics » Scalars and Vectors » Scalar and Vector Products

MCQ▾

### Question

Two forces Fl = 5i + l0j - 20k and F2 = 10i - 5j - l5k act on a single point. The angle between Fj and F2 is nearly

### Choices

Choice (4) Response

a.

30°

b.

90°

c.

45°

d.

60°

## Passage

A = 2i + j + k and B = i + j + k are two vectors.

## Question number: 56 (1 of 3 Based on Passage) Show Passage

» Kinematics » Scalars and Vectors » Scalar and Vector Products

MCQ▾

### Question

The unit vector parallel to A is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 57 (2 of 3 Based on Passage) Show Passage

» Kinematics » Scalars and Vectors » Scalar and Vector Products

MCQ▾

### Question

the unit vector perpendicular to B is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 58 (3 of 3 Based on Passage) Show Passage

» Kinematics » Scalars and Vectors » Scalar and Vector Products

MCQ▾

### Question

the unit vector perpendicular to A is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 59

» Kinematics » Scalars and Vectors » Vector Addition and Subtraction

MCQ▾

### Question

A boat is moving with a velocity 3i + 4j with respect to ground. The water in the river is moving with a velocity – 3i – 4j with respect to ground. The relative velocity of the boat with respect to water is

### Choices

Choice (4) Response

a.

-6 - 8

b.

6 + 8

c.

8

d.

5 -

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