KinematicsAverage Speed and Instantaneous Velocity (NEET (NTANational Eligibility cum Medical Entrance Test) Physics): Questions 34  38 of 108
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Question number: 34
» 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: 35
» 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: 36
» 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: 37
» 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: 38
» Kinematics » Average Speed and Instantaneous Velocity
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 
