NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 143 - 147 of 2142

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Question number: 143

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A ball is projeced from O with an initial velocity 700 cm/s in a direction 37° above the horizontal. A ball B, 500 cml away from O on the line of the initial velocity of A, isl released from rest at the instant A is projected. The height! through which B falls, before it is hit by A and the directionl of the velocity A at the time of impact will respectively bel [given g = 10 m/s2, sin 37° = 0.6 and cos 37° = 8.0]

Choices

Choice (4) Response

a.

245 cm, 20° 44

b.

300 cm, 27° 43

c.

255 cm, 27° 43

d.

250 cm, 28° 42

Question number: 144

» Kinematics » Uniform Circular Motion

MCQ▾

Question

The ratio of angular speeds of minute hand and hour hand of a watch is -

Choices

Choice (4) Response

a.

6: 1

b.

1: 6

c.

1: 12

d.

12: 1

Question number: 145

» Kinematics » Motion in a Plane

MCQ▾

Question

A ball thrown by one player reaches the other in 2 sec. The maximum height attained by the ball above the point of projection will be about-

Choices

Choice (4) Response

a.

2.5 m

b.

7.5 m

c.

10 m

d.

5 m

Question number: 146

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A projectile thrown from a height of 10 m with velocity of √2 m/s, the projectile will fall, from the foot of projection, at distance- (g = 10 m/s 2)

Choices

Choice (4) Response

a.

1 m

b.

3 m

c.

√2 m

d.

2 m

Question number: 147

» Kinematics » Uniformly Accelerated Motion

MCQ▾

Question

The shaft of an electric motor starts from rest and on the application of a torque, it gains an angular acceleration given by a = 3t –t 3 during the first 2 seconds after it starts after which a = 0. The angular velocity after 6 sec will be –

Choices

Choice (4) Response

a.

2 rad/sec

b.

1 rad/sec

c.

3 rad/sec

d.

4 rad/sec

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