KinematicsAverage Speed and Instantaneous Velocity (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 40  43 of 108
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Question number: 40
» Kinematics » Average Speed and Instantaneous Velocity
Question
Choose the correct options
(1) A ball is dropped from the window of a moving train on horizontal rails, the path followed by the ball as observed by the observer on the ground is parabolic path.
(2) If T be the total time of flight of a current of water and H be the maximum height attained by it from the point of projection, then H/T will be (1/4) u sin 0
(u = projection velocity and 0 = projection angle)
(3) A hunter aims his gun and fires a bullet directly at a monkey on a tree. At the instant bullet leaves the gun, monkey drops, the bullet misses to hit the monkey.
(4) If a baseball player can throw a ball at maximum distance = d over a ground, the maximum vertical height to which he can throw it, will be d
(Ball have same initial speed in each case)
Choices
Choice (4)  Response  

a.  2 and 4 

b.  1 and 2 

c.  1 and 3 

d.  1, 2 and 3 

Question number: 41
» Kinematics » Average Speed and Instantaneous Velocity
Question
A particle moves in a circle of radius 20cm with a linear speed of 10m/s. The angular velocity will be –
Choices
Choice (4)  Response  

a.  100 rad/s 

b.  50 rad/s 

c.  25 rad/s 

d.  75 rad/s 

Question number: 42
» Kinematics » Average Speed and Instantaneous Velocity
Question
A car driver is negotiating a curve of radius 200 m with a speed of 15 km/hr. The angle through which he has to lean from the vertical will be –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 43
» Kinematics » Average Speed and Instantaneous Velocity
Question
A particle is moving in a circular path with velocity varying with time as v = 1.5t+ 2t. If the radius of circular path is 2 cm. the angular acceleration at t = 2 sec will be –
Choices
Choice (4)  Response  

a.  400 rad/sec ^{2} 

b.  4 rad/sec ^{2} 

c.  0.4 rad/sec ^{2} 

d.  40 rad/sec ^{2} 
