NEET Physics: Questions 173  178 of 2142
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Question number: 173
» Kinematics » Average Speed and Instantaneous Velocity
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 

Question number: 174
» Kinematics » Average Speed and Instantaneous Velocity
Question
A body is projected downdwards at an angle of 30° to the horizontal with a velocity of 9.8 m/s from the top of a tower 29.4 m high. How long will it take before striking the ground?
Choices
Choice (4)  Response  

a.  3s 

b.  Is 

c.  4s 

d.  2s 

Question number: 175
» Kinematics » Average Speed and Instantaneous Velocity
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
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
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
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 
