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MCQ Tutorial - Physics->Gravitational

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1.) If the angular speed of the earth is doubled, the value of acceleration due to gravity (g) at the
north pole
Options are:
A.) Remain Same
B.) Becomes half
C.) Becomes zero
D.) Doubles
2.) The weight of a body at the centre of the earth is:
Options are:
A.) Infinite
B.) Zero
C.) Eight times
D.) Same as on the surface of earth 
3.) The time period of a simple pendulum on a freely moving artificial satellite is:
Options are:
A.) 3 Sec
B.) Zero
C.) 2 Sec
D.) Infinite
4.) At what height over the earths pole, the free fall acceleration decreases by one percent (assume the
radius of earth to be 6400 km):
Options are:
A.) 8 km
B.) 32 km
C.) 1.253 km
D.) 64 km
5.) The radius of the earth is 6400 km and g=10 In order that a body of 5 kg weights zero at the
equator, the angular speed of the earth is:
Options are:
A.) 1/400 radian/sec
B.) 1/800 radian/sec
C.) 1/1600 radian/sec
D.) 1/80 radian/sec
                        
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