KinematicsAverage Speed and Instantaneous Velocity (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 44  48 of 108
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Question number: 44
» Kinematics » Average Speed and Instantaneous Velocity
Question
A particle moves in a circle of radius 10cm with a linear speed of 20m/s. The angular velocity will be –
Choices
Choice (4)  Response  

a.  25 rad/s 

b.  75 rad/s 

c.  50 rad/s 

d.  200 rad/s 

Question number: 45
» Kinematics » Average Speed and Instantaneous Velocity
Question
The angular speed with which the earth would have to rotate on its axis so that a person on the equator would weigh (3/5) ^{th} as much as present, will be: (Take the equatorial radius as 6400 km)
Choices
Choice (4)  Response  

a.  7.8 x 10 ^{3} rad/sec 

b.  7.8 x 10 ^{4} rad/sec 

c.  8.7 x 10 ^{3} rad/sec 

d.  8.7 x 10 ^{4} rad/sec 

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: 46 (1 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: 47 (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: 48 (3 of 3 Based on Passage) Show Passage
» Kinematics » Average Speed and Instantaneous Velocity
Question
An aeroplane is flying horizontally with a velocity of 720 km/h at an altitude of 490 m. When it is just vertically above the target a bomb is dropped from it. How far horizontally it missed the target?
Choices
Choice (4)  Response  

a.  2000 m 

b.  200 m 

c.  1000 m 

d.  100 m 
