NEET Physics: Questions 175 - 179 of 2098

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Question number: 175

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A ball projected with speed ‘u’ at an angle of projection 15° has range R. The other angle of projection at which the range will not be same with same initial speed ‘u’ is

Choices

Choice (4) Response

a.

90°

b.

35°

c.

45°

d.

75°

Question number: 176

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A body of mass 2 kg lying on a smooth surface is attached to a string 3 m long and then whirled round in a horizontal circle making 60 revolution per minute. The centripetal acceleration will be

Choices

Choice (4) Response

a.

1.18 m/s 2

b.

2.368 m/s 2

c.

23.68 m/s 2

d.

118.4 m/s 2

Question number: 177

» Laws of Motion » Centripetal Force

MCQ▾

Question

A body of mass 0.1 kg is moving on circular path of diameter 1.0 m at the rate of 10 revolutions per 31.4 seconds. The centripetal force acting on the body is -

Choices

Choice (4) Response

a.

0.2 N

b.

4N

c.

2N

d.

0.4 N

Question number: 178

» Kinematics » Motion in a Plane

MCQ▾

Question

The height y and the distance x along the horizontal at plane of the projectile on a certain planet (with no surrounding atmosphere) are given by y = (8t - 5t2) metre and x = 6t metre where t is in second. The velocity with which the projectile is projected is

Choices

Choice (4) Response

a.

6 m/s

b.

8 m/s

c.

10 m/s

d.

Data is insufficient

Question number: 179

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

Mr C. P. Nawani kicked off a football with an initial speed 19.6 m/s at a projection angle 45°. A receiver on the goal line 67.4 m away in the direction of the kick starts running to meet the ball at that instant. What must be his speed so that he could catch the ball before hitting the ground?

Choices

Choice (4) Response

a.

2/V2m/s

b.

39.2 m/s

c.

10 m/s

d.

2.82 m/s

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