NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics: Questions 174  178 of 2184
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Question number: 174
» 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.  2.25: 9.8 

b.  6.38: 1 

c.  2.5: 9.8 

d.  1: 6.38 

Question number: 175
» 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.  Is 

b.  2s 

c.  4s 

d.  3s 

Question number: 176
» 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.  35° 

b.  90° 

c.  45° 

d.  75° 

Question number: 177
» 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.  118.4 m/s ^{2} 

b.  2.368 m/s ^{2} 

c.  23.68 m/s ^{2} 

d.  1.18 m/s ^{2} 

Question number: 178
» 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.  2N 

b.  4N 

c.  0.2 N 

d.  0.4 N 
