KinematicsAverage Speed and Instantaneous Velocity (NEET (NTANational Eligibility cum Medical Entrance Test) Physics): Questions 88  92 of 108
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Question number: 88
» Kinematics » Average Speed and Instantaneous Velocity
Question
A rifle man, who together with his rifle has a mass of 100 kg, stands on a smooth surface fires 10 shots horizontally. Each bullet has a mass 10 gm and a muzzle velocity of 800 m/s. What velocity does rifle man acquire at the end of 10 shots?
Choices
Choice (4)  Response  

a.  0.3 m/s 

b.  1.2 m/s 

c.  0.5 m/s 

d.  0.8 m/s 

Question number: 89
» Kinematics » Average Speed and Instantaneous Velocity
Question
In the figure shown, the velocity of each particle at the end of 4 sec will be 
Choices
Choice (4)  Response  

a.  2.18 m/s 

b.  0.872 m/s 

c.  0.218 m/s 

d.  8.72 m/s 

Question number: 90
» Kinematics » Average Speed and Instantaneous Velocity
Question
The mass of a rocket is 500 kg and the relative velocity of the gases ejecting from it is 250 m/s with respect to the rocket. The rate of burning of the fuel in order to give the rocket an initial acceleration 20 m/s ^{2} in the vertically upward direction (g = 10 m/s ^{2}), will be –
Choices
Choice (4)  Response  

a.  45 kg/s 

b.  10 kg/s 

c.  60 kg/s 

d.  30 kg/s 

Question number: 91
» Kinematics » Average Speed and Instantaneous Velocity
Question
rifle man, who together with his rifle has a mass of 100 kg, stands on a smooth surface fires 10 shots horizontally. Each bullet has a mass 10 gm and a muzzle velocity of 900 m/s. What velocity does rifle man acquire at the end of 10 shots.
Choices
Choice (4)  Response  

a.  0.3 m/s 

b.  0.6 m/s 

c.  0.9 m/s 

d.  0.5 m/s 

Passage
Read the passage given below and answer the questions that follow:
A small particle of mass m/10 is moving horizontally at a height of 3R/2 from ground with velocity 10 m/s. A perfectly inelastic collision occurs at point P of sphere of mass m placed on smooth horizontal surface. The radius of sphere is R, (m = 10 kg and R = 0.1 m) (Assume all surfaces to be smooth).
Question number: 92 (1 of 3 Based on Passage) Show Passage
» Kinematics » Average Speed and Instantaneous Velocity
Question
A small particle of mass m/10 is moving horizontally at a height of 3R/2 from ground with velocity 10 m/s. A perfectly inelastic collision occurs at point P of sphere of mass m placed on smooth horizontal surface. The radius of sphere is R, (m = 10 kg and R = 0.1 m) (Assume all surfaces to be smooth).
Speed of sphere just after collision is
Choices
Choice (4)  Response  

a.  35/43 m/s 

b.  30/43 m/s 

c.  27/43 m/s 

d.  40/43 m/s 
