Kinematics (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 23  26 of 233
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Question number: 23
» Kinematics » Motion in a Plane
Question
Three different objects of masses m1, m2 and w3 are allowed to fall from rest and from the same point ‘O’ along three different frictionless paths. The speeds of the three objects, on reaching the ground, will be in the ratio of
Choices
Choice (4)  Response  

a. 


b.  m _{1 }: m _{2}: m _{3 } 

c.  1: 1: 1 

d.  m _{1 }: 2m _{2}: 3m _{3 } 

Question number: 24
» Kinematics » Motion in a Straight Line
Question
Time taken by an object falling from rest to cover the height of h1 and h2 is respectively t1 and t2 then the ratio of ty to t2 is
Choices
Choice (4)  Response  

a.  h _{1}: 2h _{2} 

b.  : 

c.  2h _{1}: h _{2} 

d.  h _{1}: h _{2} 

Question number: 25
» 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, 2 and 3 

b.  2 and 4 

c.  1 and 3 

d.  1 and 2 

Question number: 26
» Kinematics » Motion in a Straight Line
Question
A body travels for 15 second starting from rest with constant acceleration. If it travels distances S _{1}, S _{2} and S _{3}, in the first five seconds, second five seconds and next five seconds respectively the relation between S _{1}, S _{2} and S _{3} is
Choices
Choice (4)  Response  

a.  s _{1} = s _{2} = s _{3} 

b.  s _{1} = s _{2} = s _{3} 

c.  5s _{1} = 3s _{2} = s _{3} 

d.  s _{1} = s _{2} = s _{3} 
