Kinematics (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 136  141 of 233
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Passage
Velocity at a general point P (x, y) for a horizontal projectile motion is given by
V = =
α is angle made by v with horizontal in clockwise direction Trajectory equation for a horizontal projectile motion is given by x = v _{x} t = ut
y = () gt ^{2 }
Eliminating t, We get y =
Question number: 136 (2 of 3 Based on Passage) Show Passage
» Kinematics » Average Speed and Instantaneous Velocity
Question
A ball rolls off top of a stair way with a horizontal velocity u m/s. If the steps are h m high and b meters wide, the ball will just hit the edge of nth step if n equals to
Choices
Choice (4)  Response  

a. 


b. 


c. 


d.  Both c. and a. are correct 

Question number: 137 (3 of 3 Based on Passage) Show Passage
» Kinematics » Average Speed and Instantaneous Velocity
Question
An aeroplane is in a level flying at an speed of 144 km/hr at an altitude of 1000 m. How far horizontally from a given target should a bomb be released from it to hit the target?
Choices
Choice (4)  Response  

a.  471.34 m 

b.  671.43 m 

c.  371.34 m 

d.  571.43 m 

Question number: 138
» Kinematics » Uniform Circular Motion
Question
A particle completes 1.5 revolutions in a circular path of radius 2 cm. The angular displacement of the particle will be  (in radian)
Choices
Choice (4)  Response  

a.  2 π 

b.  6 π 

c.  π 

d.  3 π 

Question number: 139
» Kinematics » Motion in a Plane
Question
When the angle of elevation of a gun are 60° and 30° respectively, the height it shoots are h1 and h2 respectively, hj/h2 equal to –
Choices
Choice (4)  Response  

a.  1/3 

b.  2/1 

c.  1/2 

d.  3/1 

Question number: 140
» Kinematics » Uniformly Accelerated Motion
Question
The magnitude of the linear acceleration of the particle moving in a circle of radius 10 cm with uniform speed completing the circle in 4 s, will be –
Choices
Choice (4)  Response  

a.  2.5 π ^{2} cm/s ^{2} 

b.  2.5π cm/s ^{2} 

c.  5 π cm/s ^{2} 

d. 
5 π ^{2} cm/s ^{2} 

Question number: 141
» Kinematics » Average Speed and Instantaneous Velocity
Question
A car of 500 kg moving with a velocity of 18 km/hr is stopped by the brake force of 500 N. The distance covered by it before coming to rest is –
Choices
Choice (4)  Response  

a.  1.44 m 

b.  12.5 m 

c.  12 m 

d.  16.2 m 
