441 If a car moves with a uniform speed of 2 ms-1 in a circle of radius 0.4. Its angular speed is______________? Physics Medium Full question → A 4 rad. S-1 B 5 rad. S-1 C 1.6 rad. S-1 D 2.8 ms-1
442 In case of planets the necessary acceleration is provided by______________? Physics Medium Full question → A Gravitational force B Frictional force C Coulomb force D Centripetal force
443 The span of the broad jump depends upon_______________? Physics Medium Full question → A Mass of the jumper B Height of jump C Angle of projection D None
444 A stone is whirled in a vertical circle at the end of a string. When the stone is at the highest position the tension in the string is______________? Physics Medium Full question → A Maximum B Zero C Equal to the weight of the stone D Less than the weight of the stone
445 When a body moves in a circle of radius r with linear speed V its centripetal force is_______________? Physics Medium Full question → A mV/r2 B mV/r C mV2/r D mV2/r2
446 Centripetal force performs_______________? Physics Medium Full question → A Maximum work B Minimum work C Negative work D No work
447 When a body is whirled in a horizontal circle by means of a string the centripetal force is supplied by______________? Physics Medium Full question → A Mass of a body B Velocity of body C The tension in the string D Centripetal acceleration
448 The relation between linear and angular acceleration is______________? Physics Medium Full question → A a = a x r B a = r x a C a = a x r D r = a x a
449 The circumference subtends an angle________________? Physics Medium Full question → A π radian B 2π radian C π/2 radian D 4π radian
450 The direction of the linear velocity of a body moving in a circle is______________? Physics Medium Full question → A along the axis of rotation B along the tangent C directed towards the centre D directed away from the centre
451 The period of a circular motion is given by_______________? Physics Medium Full question → A T = πv B T = πw C T = 2πr D T = 2πr/v
452 One radian is equal to______________? Physics Medium Full question → A 67.3° B 57.3° C 87.3° D 60°
453 According to Einstein, the gravitational interaction is possible between_______________? Physics Medium Full question → A material objects only B material objects and electromagnetic radiation only C electromagnetic radiations D none of the above
454 The radius of geostationary orbit from the centre of the earth is nearly______________? Physics Medium Full question → A 42000km B 36000km C 24000 km D 18000 km
455 Geostationary satellite completes one rotation around the earth in_______________? Physics Medium Full question → A 3 hours B 6 hours C 12 hours D 24 hours
456 The critical speed of an artificial satellite is_______________? Physics Medium Full question → A 8 Kms-1 B 8.1 Kms-1 C 7.9 Kms-1 D 8 ms-1
457 A hoop and disc have same mass and radius. Their rotational K.E are related by an equation______________? Physics Medium Full question → A K.E hoop = K.E disc B K.E hoop = 2K.E disc C K.E hoop = 1/2K.E disc D K.E hoop = 4K.E disc
458 The rotational K.E of the hoop is equal to the______________? Physics Medium Full question → A its translational K.E B half than its translational K.E C double than its translational K.E D four times than its translational K.E
459 Which of the following is not a correct representation method for prefixes______________? Physics Medium Full question → A 1mm B 10km C 1000um D Both A and B
460 The number 76.85 is rounded off up to two significant figures as_____________? Physics Medium Full question → A 76.8 B 77 C 76.9 D None of these