[{"id":155263,"question":"A body moving along the circumference of a circle of radius R completes one revolution. The radius of a covered path to the angle subtended at the centre 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":155262,"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":155261,"question":"A car is turning around a corner at 10 m/sec as it travels along an arc of a 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":155258,"question":"The rear wheels of an automobile are rotating with an angular velocity of 14 rev/sec which is reduced to 38 rad/sec in 5 second when brakes are applied. Its angular acceleration is:","choices":[{"text":"5 rad/sec<sup>2</sup>","value":"A"},{"text":"-10 rev/sec<sup>2</sup>","value":"B"},{"text":"-10 rad/sec<sup>2</sup>","value":"C"},{"text":"-5 rev/sec<sup>2</sup>","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155256,"question":"A toy car 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":155255,"question":"A stone tied to the end of a 20 cm long string is whirled in a horizontal circle. If centripetal acceleration is 9.8 m/sec<sup>2</sup>, then its angular velocity is rad/sec is:","choices":[{"text":"22/7","value":"A"},{"text":"7","value":"B"},{"text":"14","value":"C"},{"text":"21","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":155254,"question":"Centripetal force performs:","choices":[{"text":"Maximum work","value":"A"},{"text":"Negative work","value":"B"},{"text":"Positive work","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":155253,"question":"A rotating body tends to be slower, when its angular acceleration is:","choices":[{"text":"Positive","value":"A"},{"text":"Negative","value":"B"},{"text":"Zero","value":"C"},{"text":"Infinity","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":155251,"question":"When body moves along a circular path with constant speed, it has an acceleration, which is always directed;","choices":[{"text":"Along the tangent","value":"A"},{"text":"Towards the centre","value":"B"},{"text":"Away from the centre","value":"C"},{"text":"None of them","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155249,"question":"One radian is equal to:","choices":[{"text":"30.3°","value":"A"},{"text":"45.3°","value":"B"},{"text":"50.3°","value":"C"},{"text":"57.3°","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":155247,"question":"When angular acceleration is positive, the body rotates:","choices":[{"text":"Slower","value":"A"},{"text":"Slowest","value":"B"},{"text":"Faster","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155246,"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 these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155244,"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":155243,"question":"Direction of motion ______ in circular 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":4},{"id":155239,"question":"A point on the rim of a wheel moves 0.2 m where the wheel turns through an angle is 14.3 degrees. The radius of the wheel is:","choices":[{"text":"0.05 m","value":"A"},{"text":"0.08 m","value":"B"},{"text":"0.8 m","value":"C"},{"text":"0.008 m","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155223,"question":"Work is product of:","choices":[{"text":"Force and velocity","value":"A"},{"text":"Heat and energy","value":"B"},{"text":"Force and displacement","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155220,"question":"A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, Which makes an angle of 60<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;\">° with the horizontal. The work done by the boy is:</span>","choices":[{"text":"1.25 J","value":"A"},{"text":"12.5 J","value":"B"},{"text":"125 J","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155217,"question":"If we draw a graph between d(along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis then area under this straight line represents:","choices":[{"text":"Power","value":"A"},{"text":"Work","value":"B"},{"text":"Pressure","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":155213,"question":"The work done by a force, keeping an object in circular motion with constant speed is:","choices":[{"text":"Zero J","value":"A"},{"text":"1 J","value":"B"},{"text":"0.1 J","value":"C"},{"text":"0.01 J","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155211,"question":"Which force is not a conservative force?","choices":[{"text":"Frictional force","value":"A"},{"text":"Gravitational force","value":"B"},{"text":"Electric force","value":"C"},{"text":"Elastic spring force","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155210,"question":"A laborer carrying a load on his head moves from the rest on a horizontal road to another point where he comes to rest. He has done:","choices":[{"text":"Minimum Work","value":"A"},{"text":"Maximum Work","value":"B"},{"text":"Zero Work","value":"C"},{"text":"Negative Work","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155208,"question":"A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which force makes with the direction of motion of a body is:","choices":[{"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;\">°</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;\">°</span>","value":"B"},{"text":"60<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":"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;\">°</span>","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155199,"question":"A 100 kg car is moving at a speed of 10 m/sec and comes to rest after covering a distance of 50 m. the amount of work done against friction is:","choices":[{"text":"+5 x 10<sup>1</sup>J","value":"A"},{"text":"+5 x 10<sup>2</sup>J","value":"B"},{"text":"+5 x 10<sup>3</sup>J","value":"C"},{"text":"+5 x 10<sup>4</sup>J","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155194,"question":"When a body moves against the force of friction on a horizontal plane, the work done by the body is:","choices":[{"text":"Positive","value":"A"},{"text":"Negative","value":"B"},{"text":"Zero","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":155190,"question":"In the force applied to parallel to the direction of motion, then the work done is:","choices":[{"text":"Positive","value":"A"},{"text":"Negative","value":"B"},{"text":"Zero","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":155185,"question":"A 2 kg block is held 1 m above floor for 50 seconds. The work done is:","choices":[{"text":"Zero","value":"A"},{"text":"10.2 J","value":"B"},{"text":"100 J","value":"C"},{"text":"980 J","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155183,"question":"Work done in lower and bucket into the well is:","choices":[{"text":"Zero","value":"A"},{"text":"Positive","value":"B"},{"text":"Negative","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155167,"question":"A field in which the work done is moving a body along closed path is zero is called:","choices":[{"text":"Nuclear filed","value":"A"},{"text":"Conservative field","value":"B"},{"text":"Gravitational field","value":"C"},{"text":"Non-conservative field","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":155162,"question":"When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is:","choices":[{"text":"2 J","value":"A"},{"text":"0.25 J","value":"B"},{"text":"1 J","value":"C"},{"text":"0.5 J","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155158,"question":"The work done in moving a body between two points in a conservation field is independent of the:","choices":[{"text":"Direction","value":"A"},{"text":"Force applied","value":"B"},{"text":"Path followed by the body","value":"C"},{"text":"Power","value":"D"},{"value":"E"}],"correctAnswer":3}]