Laws of MotionForce and Inertia (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 6  10 of 57
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Question number: 6
» Laws of Motion » Force and Inertia
Question
A 5 kg balls is swing in a vertical circle at the end of a cord 1 m long. The maximum speed at which it can swing if the cord can sustain maximum tension of 150 N will be –
Choices
Choice (4)  Response  

a.  64 m/s 

b.  36.5 m/s 

c.  3.18 m/s 

d.  101 m/s 

Question number: 7
» Laws of Motion » Force and Inertia
Question
The string of a pendulum is horizontal. The mass of the bob is m. Now the string is released. The tension in the string in the lowest position is –
Choices
Choice (4)  Response  

a.  1 mg 

b.  2 mg 

c.  3 mg 

d.  4 mg 

Question number: 8
» Laws of Motion » Force and Inertia
Question
A stone of mass 1 kg tied to a light inextensible string of length L = 10/6 m is whirling in a circular path of radius L in a vertical plane. If the ratio of the maximum tension in the string to the minimum tension in the suing is 4 and if g is taken to be 10m/sec ^{2}, the speed of the stone at the highest point of the circle is
Choices
Choice (4)  Response  

a.  m/sec 

b.  20 m/sec 

c.  7.07 m/sec 

d.  m/sec 

Question number: 9
» Laws of Motion » Force and Inertia
Question
A swimmer can swim in still water at a rate 4 km/h. If he swims in a river flowing at 3 km/h and keeps his direction (w. r. t. water) perpendicular to the current. Find his velocity w. r. t. the ground.
Choices
Choice (4)  Response  

a.  3 km/hr 

b.  7 km/hr 

c.  5 km/hr 

d.  4 km/hr 

Question number: 10
» Laws of Motion » Force and Inertia
Question
A cane filled with water is revolved in a vertical circle of diameter 2 m and the water does not fall down n maximum period of revolution must be –
Choices
Choice (4)  Response  

a.  14.15 

b.  4.02 

c.  1.45 

d.  2.006 
