KinematicsAverage Speed and Instantaneous Velocity (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 1  4 of 108
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Question number: 1
» Kinematics » Average Speed and Instantaneous Velocity
Question
Assertion (Ꭺ)
The velocity of a body A relative to the body B is the sum of the velocities of bodies A and B if both travel in opposite direction on a straight line.
Reason (Ꭱ)
The velocity of a body A relative to the body B is the difference of the velocities of bodies A and B if both travel in opposite direction on a straight line.
Choices
Choice (4)  Response  

a.  Ꭺ is false but Ꭱ is true 

b.  Ꭺ is true but Ꭱ is false 

c.  Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ 

d.  Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ 

Question number: 2
» Kinematics » Average Speed and Instantaneous Velocity
Question
A train of 150 meter length is going towards north direction at a speed of 10 m/s. A parrot flies at the speed of 5 m/s towards south direction parallel to the railway track. The time taken by the parrot to cross the train is
Choices
Choice (4)  Response  

a.  15 sec 

b.  8 sec 

c.  12 sec 

d.  10 sec 

Question number: 3
» Kinematics » Average Speed and Instantaneous Velocity
Question
A train is moving towards east and a car is along north, both with same speed. The observed direction of car to the passenger in the train is
Choices
Choice (4)  Response  

a.  Eastnorth direction 

b.  Southeast direction 

c.  Westnorth direction 

d.  Question does not provide sufficient data or is vague 

Question number: 4
» Kinematics » Average Speed and Instantaneous Velocity
Question
From the top of a multistoried building 40m tall, a boy projects a stone vertically upwards with an initial velocity of 10 ms ^{1} such that it eventually falls to the ground.
(1) After 4 s the stone will strike the ground
(2) After 2 s the stone will pass through the point from where it was projected
(3) Its velocity when it strikes the ground is 30 m/s
(4) Its velocity when it strikes the ground is 40 m/s
Choices
Choice (4)  Response  

a.  1 and 3 

b.  1 and 2 

c.  1,2 and 3 

d.  2 and 4 
