KinematicsMotion in a Straight Line (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 24  27 of 47
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Question number: 24
» Kinematics » Motion in a Straight Line
Question
a particle moving in a straight line covers half the distance with speed of 3 m/s. The other half of the distance is covered in two equal time intervals with speed of 4.5 m/s and 7.5 m/s respectively. The average speed of the particle during this motion is
Choices
Choice (4)  Response  

a.  5.0 m/s 

b.  5.5 m/s 

c.  4.8 m/s 

d.  4.0 m/s 

Question number: 25
» Kinematics » Motion in a Straight Line
Question
A plane is to fly due north. The speed of the plane relative to the air is 200 km/h, and the wind is blowing from west to east at 90 km/h.
(1) The plane should head in a direction of sin1 (0.45)
(2) The plane should head in a direction of sin1 (0.60)
(3) The relative velocity of plane w. r. t. ground is 179 km/h
(4) The relative velocity of plane w. r. t. ground is 149 km/h
Choices
Choice (4)  Response  

a.  1 and 2 

b.  1, 2 and 3 

c.  2 and 4 

d.  1 and 3 

Question number: 26
» Kinematics » Motion in a Straight Line
Question
A particle of mass m moves on the xaxis as follows: it starts from rest at t = 0 from the point x  0 and comes to rest at t = 1 at the point x = 1. No other information is available about its motion at intermediate time (0 < t < 1). If a denotes the instantaneous acceleration of the particle, then
Choices
Choice (4)  Response  

a.  A cannot remain positive for all t in the interval 0 < t < l 

b.  Must be > 4 at some point or points in its path 

c.  Cannot exceed 2 at any point in its path 

d.  = 2 at any point in its path. 

Question number: 27
» Kinematics » Motion in a Straight Line
Question
The position of a particle moving in the xyplane at any time t is given by x = (4t ^{2 }  8t) metres, y = (5t ^{2}  10t) metres. Select the correct statement about the moving particle from the following
Choices
Choice (4)  Response  

a.  The velocity of the particle is zero at t = 1 second 

b.  The velocity of the particle is zero at t = 0 second 

c.  The acceleration of the particle is zero at t = 0 second 

d.  The velocity and acceleration of the particle are never zero 
