Kinematics (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 116  120 of 233
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Question number: 116
» 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: 117
» 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: 118
» 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: 119
» 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 

Question number: 120
» 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 
