[{"id":153906,"question":"Radian is defined as the angle subtended at the center of a circle by an arc of:","choices":[{"text":"Length equal to its diameter","value":"A"},{"text":"Length equal to its radius","value":"B"},{"text":"Any length","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":153905,"question":"A body moving along the circumference of a circle of radius R completes one revolution. The radius of the covered path to the angle subtended at the center is:","choices":[{"text":"Radius of the circle","value":"A"},{"text":"Twice the radius","value":"B"},{"text":"Thrice the radius","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":153904,"question":"A flywheel accelerates from rest to an angular velocity of 7 rad/sec in 7 seconds. Its average acceleration will be:","choices":[{"text":"49 rad/sec<sup>2</sup>","value":"A"},{"text":"1 rad/sec<sup>2</sup>","value":"B"},{"text":"0.16 rev/sec<sup>2</sup>","value":"C"},{"text":"Both A and C","value":"D"},{"text":"Both B and C","value":"E"}],"correctAnswer":5},{"id":153903,"question":"A car is turning around a corner at 10 m/sec as it travels along an arc of circle. If value of centripetal acceleration is 10 m/sec<sup>2</sup>in this case, find radius of the circular path:","choices":[{"text":"1 m","value":"A"},{"text":"5 m","value":"B"},{"text":"10 m","value":"C"},{"text":"15 m","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":153902,"question":"A 1000 Kg car travelling with a speed of 90 km/hr turns around a curve of radius 0.1 km. The necessary centripetal force comes out to be:","choices":[{"text":"8.1 X 10<sup>7</sup>N","value":"A"},{"text":"625 N","value":"B"},{"text":"6250 N","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":153901,"question":"A rotating wheel accelerates up to the value of 0.75 rev/sec<sup>2</sup>after 2 seconds of its start. Its angular velocity becomes:","choices":[{"text":"9.42 rad/sec","value":"A"},{"text":"2.6 rev/sec","value":"B"},{"text":"1.5 rev/sec","value":"C"},{"text":"Both A and C","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":153900,"question":"The rear wheels of an automobile are rev/sec which is reduced to 38 rad/sec in 5 seconds when brakes are applied. Its angular acceleration is:","choices":[{"text":"5 rad/sec<sup>2</sup>","value":"A"},{"text":"-10 rav/sec<sup>2</sup>","value":"B"},{"text":"-10 rad/sec<sup>2</sup>","value":"C"},{"text":"-5 rav/sec<sup>2</sup>","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":153899,"question":"A car is moves around a circular track of radius 0.3 m at the rate of 120 rev/min. The speed v of the car is:","choices":[{"text":"38 m/sec","value":"A"},{"text":"3.8 m/sec","value":"B"},{"text":"0.6 m/sec","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":153898,"question":"A stone is tied to the end of a 20 cm along string is whirled in a horizontal circle.<div>if centripetal acceleration is 9.8 m/sec<sup>2</sup>, then its angular velocity in rad/sec is:</div>","choices":[{"text":"22/7","value":"A"},{"text":"7","value":"B"},{"text":"14","value":"C"},{"text":"21","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":153895,"question":"One radian is equal to:","choices":[{"text":"30.3<span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">°</span>","value":"A"},{"text":"45.3<span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">°</span>","value":"B"},{"text":"50.3<span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">°</span>","value":"C"},{"text":"57.3<span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">°</span>","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":153893,"question":"When a body is moves along a circular path with constant speed, it has an acceleration, which is always directed:","choices":[{"text":"Along the tangent","value":"A"},{"text":"Toward the centre","value":"B"},{"text":"Away from the centre","value":"C"},{"text":"None of them","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":153892,"question":"One radian is:","choices":[{"text":"Greater than one degree","value":"A"},{"text":"Less than one degree","value":"B"},{"text":"Equal to one degree","value":"C"},{"text":"None of them","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":153891,"question":"Centripetal acceleration is also called _______ acceleration:","choices":[{"text":"Tangential","value":"A"},{"text":"Radial","value":"B"},{"text":"Angular","value":"C"},{"text":"None of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":153890,"question":"Direction of motion_______ in circular of motion:","choices":[{"text":"Changes off and on","value":"A"},{"text":"Changes continuously","value":"B"},{"text":"Does not change","value":"C"},{"text":"None of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":153888,"question":"Conventionally the angular velocity is directed to an angle of:","choices":[{"text":"90<span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">° to the axis of rotation</span>","value":"A"},{"text":"30<span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">° to the axis of rotation</span>","value":"B"},{"text":"0<span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">° to the axis of rotation</span>","value":"C"},{"text":"None of the above","value":"D"},{"value":"E"}],"correctAnswer":3}]