# Kinematics-Average Speed and Instantaneous Velocity (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 42 - 46 of 108

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## Question number: 42

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

### Question

A car driver is negotiating a curve of radius 200 m with a speed of 15 km/hr. The angle through which he has to lean from the vertical will be –

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 43

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

### Question

A particle is moving in a circular path with velocity varying with time as v = 1.5t-+ 2t. If the radius of circular path is 2 cm. the angular acceleration at t = 2 sec will be –

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 44

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

### Question

A particle moves in a circle of radius 10cm with a linear speed of 20m/s. The angular velocity will be –

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 45

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

### Question

The angular speed with which the earth would have to rotate on its axis so that a person on the equator would weigh (3/5) th as much as present, will be: (Take the equatorial radius as 6400 km)

### Choices

Choice (4) Response

a.

7.8 x 10 3 rad/sec

b.

7.8 x 10 4 rad/sec

c.

8.7 x 10 3 rad/sec

d.

8.7 x 10 4 rad/sec

## Passage

Velocity at a general point P (x, y) for a horizontal projectile motion is given by

V = =

α is angle made by v with horizontal in clockwise direction Trajectory equation for a horizontal projectile motion is given by x = v x t = ut

y =- () gt 2

Eliminating t, We get y =-

## Question number: 46 (1 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

### Question

A ball rolls off top of a stair way with a horizontal velocity u m/s. If the steps are h m high and b meters wide, the ball will just hit the edge of nth step if n equals to

### Choices

Choice (4) Response

a.

b.

c.

d.

Both c. and a. are correct

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