Physics
Rotational and Circular Motion
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#185 Minimum number of geostationary satellites required to cover the whole earth. The angular displacement between them will be
A) 60°
B) 120°
C) 180°
D) 240°
#186 If a satellite is orbiting around earth then ______ cannot be used to mean time
A) Pendulum clock
B) Elastic spring watch
C) Atomic clock
D) Electric oscillation clock
#187 If value of g is 10 m/s², then critical velocity of satellite close to earth is
A) 8 m/s
B) 8 km/s
C) 80 m/s
D) 80 km/s
#188 A satellite moving round the earth constitutes
A) An inertial frame of reference
B) non inertial frame
C) neither inertial nor non inertial
D) both inertial and non-inertial
#189 When a body moves in a circle, the angle between its linear velocity and angular velocity is always
A) 180°
B) 0°
C) 90°
D) 45°
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