KinematicsAverage Speed and Instantaneous Velocity (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 18  21 of 108
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Question number: 18
» Kinematics » Average Speed and Instantaneous Velocity
Question
A ball is projeced from O with an initial velocity 700 cm/s in a direction 37° above the horizontal. A ball B, 500 cml away from O on the line of the initial velocity of A, isl released from rest at the instant A is projected. The height! through which B falls, before it is hit by A and the directionl of the velocity A at the time of impact will respectively bel [given g = 10 m/s2, sin 37° = 0.6 and cos 37° = 8.0]
Choices
Choice (4)  Response  

a.  245 cm, 20° 44 

b.  300 cm, 27° 43 

c.  255 cm, 27° 43 

d.  250 cm, 28° 42 

Question number: 19
» Kinematics » Average Speed and Instantaneous Velocity
Question
A projectile thrown from a height of 10 m with velocity of √2 m/s, the projectile will fall, from the foot of projection, at distance (g = 10 m/s ^{2})
Choices
Choice (4)  Response  

a.  1 m 

b.  3 m 

c.  √2 m 

d.  2 m 

Question number: 20
» Kinematics » Average Speed and Instantaneous Velocity
Question
A ball is thrown from ground level so as to just clear a wall 4 metres high at a distance of 4 metres and falls at a distance of 14 metres from the wall. The magnitude of velocity on the ball will be
Choices
Choice (4)  Response  

a.  √l82 m/s 

b.  √181 m/s 

c.  √186 m/s 

d.  √185 m/s 

Question number: 21
» Kinematics » Average Speed and Instantaneous Velocity
Question
A body of mass 4 kg lying on a smooth surface is attached to a string 6 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.  23.68 m/s ^{2} 

b.  236.6 m/s ^{2} 

c.  1.18 m/s ^{2} 

d.  2.368 m/s ^{2} 
