NEET Physics: Questions 135  141 of 2098
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Question number: 135
» Kinematics » Scalars and Vectors » Scalar and Vector Products
Question
the vector P = ai + aj + 3k and Q = ai  2j  k are perpendicular to each other. The positive value of a is
Choices
Choice (4)  Response  

a.  4 

b.  9 

c.  3 

d.  13 

Question number: 136
» Kinematics » Scalars and Vectors » Scalar and Vector Products
Question
A particle moves from position 3i + 2j6k to 14i + 13j + 9k due to a uniform force of (4i + j + 3k) N. If the displacement in metres then work done will be
Choices
Choice (4)  Response  

a.  250 J 

b.  300 J 

c.  100 J 

d.  200 J 

Question number: 137
» Kinematics » Scalars and Vectors » Scalar and Vector Products
Question
IfAxB= A. B , then angle between A and S will be
Choices
Choice (4)  Response  

a.  30 

b. 
60° 

c. 
45° 

d.  None of the above 

Passage
A particle moves along xaxis and its acceleration at any time t is a = 2 sin (πt), where t is in seconds and a is in m/s ^{2}. The initial velocity of particle (at time t = 0) is u = 0.
Question number: 138 (1 of 3 Based on Passage) Show Passage
» Kinematics » Motion in a Straight Line
Question
The distance travelled (in meters) by the particle from time t = 0 to t = t will be –
Choices
Choice (4)  Response  

a.   + 

b.   

c. 


d.  All of the above 

Question number: 139 (2 of 3 Based on Passage) Show Passage
» Kinematics » Motion in a Straight Line
Question
The magnitude of displacement (in meters) by the particle from time t = 0 to t = t will be –
Choices
Choice (4)  Response  

a.   

b.   + 

c. 


d.  None of the above 

Question number: 140 (3 of 3 Based on Passage) Show Passage
» Kinematics » Motion in a Straight Line
Question
the distance travelled (in meters) by the particle from time to t = 0 to t = 1 is will be
Choices
Choice (4)  Response  

a.  4/π 

b.  2/π 

c.  1/π 

d.  None of the above 

Question number: 141
» Kinematics » Average Speed and Instantaneous Velocity
Question
A ball is fixed to the end of a string and is rotated in a horizontal circle of radius 10 m with a speed of 20 m/sec. The acceleration of the ball will be 
Choices
Choice (4)  Response  

a.  30 m/s ^{2} 

b.  10 m/s ^{2} 

c.  20 m/s ^{2} 

d. 
40 m/s ^{2} 
