Kinematics (NEET Physics): Questions 111 - 115 of 229

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Question number: 111

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A particle is projected with a velocity u so that its horizontal range is twice the maximum height attained. The horizontal range is

Choices

Choice (4) Response

a.

u2g

b.

u22g

c.

4u25g

d.

2u23g

Question number: 112

» Kinematics » Uniformly Accelerated Motion

MCQ▾

Question

A grind stone starts from rest and has a constant-angular acceleration of 6.0 rad/sec2. The angular displacement and angular velocity, after 4 sec. will respectively be

Choices

Choice (4) Response

a.

32 rad, 64 rad/s

b.

48 rad, 24 rad/s

c.

64 rad, 32 rad/s

d.

16 rad, 32 rad/s

Passage

The velocity of the particle changes moving on the curved path, this change in velocity is brought by a force known as centripetal force and the acceleration so produced in the body is known as centripetal acceleration. The direction of centripetal force or acceleration is always towards the center of circular path.

Question number: 113 (1 of 1 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A ball is fixed to the end of a string and is rotated in a horizontal circle of radius 5 m with a speed of 10 m/sec. The acceleration of the ball will be -

Choices

Choice (4) Response

a.

40 m/s 2

b.

10 m/s 2

c.

20 m/s 2

d.

30 m/s 2

Question number: 114

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A particle describes a horizontal circle on the smooth surface of an inverted cone. The height of the plane of the circle above the vertex is 9.8 cm, then choose the correct options

(1) The speed of the particle will be 0.98 m/s

(2) tan 0 = rg/v 2 (6 is semi-apex angle)

(3) The speed of the particle will be 98 m/s

(4) tan 9 = rg/v (0 is semi apex angle)

Choices

Choice (4) Response

a.

1 and 3

b.

1, 2 and 3

c.

1 and 2

d.

2 and 4

Question number: 115

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

An air craft executes a horizontal loop of radius 1 km with a steady speed of 900 km/h. The ratio of centripetal acceleration to that gravitational acceleration will beta)

Choices

Choice (4) Response

a.

6.38: 1

b.

2.25: 9.8

c.

2.5: 9.8

d.

1: 6.38

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