Kinematics (NEET Physics): Questions 121 - 125 of 229

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Question number: 121

» Kinematics » Uniformly Accelerated Motion

MCQ▾

Question

The angular velocity of a particle is given by co = 5t - 3t 2 + 1, the time when its angular acceleration decreases to be zero will be -

Choices

Choice (4) Response
a.

0.25 sec

b.

1.2 sec

c.

0.83 sec

d.

25 sec

Question number: 122

» Kinematics » Uniform Circular Motion

MCQ▾

Question

A particle revolving in a circular path completes first one third of circumference in 2 sec, while next one third in 1 sec. The average angular velocity of particle will be - (in Rad/sec)

Choices

Choice (4) Response
a.

π/3

b.

2π/3

c.

4π/3

d.

5π/3

Question number: 123

» Kinematics » Motion in a Plane

MCQ▾

Question

A projectile is thrown at an angle 0 and (90° - 0) from the same point with same velocity 98 m/s. The heights attained by them, if the difference of heights is 50 m will be (in m)

Choices

Choice (4) Response
a.

270, 220

b.

200, 150

c.

250, 200

d.

300, 250

Question number: 124

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

Savita throws a ball horizontally with a velocity of 8 m/s from the top of her building. The ball strikes to her brother Sudhir playing at 12 m away from the building. What is the height of the building?

Choices

Choice (4) Response
a.

7m

b.

8m

c.

10m

d.

11m

Question number: 125

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

Choose the correct options

(1) A ball is dropped from the window of a moving train on horizontal rails, the path followed by the ball as observed by the observer on the ground is parabolic path.

(2) If T be the total time of flight of a current of water and H be the maximum height attained by it from the point of projection, then H/T will be (1/4) u sin 0

(u = projection velocity and 0 = projection angle)

(3) A hunter aims his gun and fires a bullet directly at a monkey on a tree. At the instant bullet leaves the gun, monkey drops, the bullet misses to hit the monkey.

(4) If a baseball player can throw a ball at maximum distance = d over a ground, the maximum vertical height to which he can throw it, will be d

(Ball have same initial speed in each case)

Choices

Choice (4) Response
a.

2 and 4

b.

1 and 2

c.

1 and 3

d.

1, 2 and 3

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