[{"id":254157,"question":"A car of 1000kg traveling at 20m/sec rounds a curve of radius 100m. Find the necessary centripetal force","choices":[{"text":"4 x 10<sup>3</sup>\r\nkg m/s<sup>2\r\n</sup>","value":"A"},{"text":"<div>3 x 10<sup>3</sup> kg m/s<sup>2</sup></div>","value":"B"},{"text":"<div>5 x 10<sup>3</sup>kg m/s<sup>2</sup></div>","value":"C"},{"text":"<div>4.5 x 10<sup>3</sup>kg m/s<sup>2</sup></div>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252909,"question":"For a particle in circular motion the centripetal acceleration","choices":[{"text":"may be more or less than its tangential acceleration","value":"A"},{"text":"equal to its tangential acceleration a","value":"B"},{"text":"more than its tangential acceleration","value":"C"},{"text":"less than its tangential acceleration","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252905,"question":"A body crosses the topmost point of a vertical circle with critical speed. Itscentripetal acceleration, when the string is horizontal will be","choices":[{"text":"4g","value":"A"},{"text":"3g","value":"B"},{"text":"g","value":"C"},{"text":"6g","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252903,"question":"A body revolved around the sun 27 times faster then the earth what is the ratioof their radii","choices":[{"text":"1/27","value":"A"},{"text":"1/4","value":"B"},{"text":"1/9","value":"C"},{"text":"1/3","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252898,"question":"The force which can do no work on the body on which it acts:","choices":[{"text":"Frictional force","value":"A"},{"text":"Elastic force","value":"B"},{"text":"Gravitational force","value":"C"},{"text":"Centripetal force","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252895,"question":"For a particle moving in uniform circular motion","choices":[{"text":"Velocity is transverse and acceleration is radical","value":"A"},{"text":"Velocity is radial and acceleration is transverse","value":"B"},{"text":"Both velocity and acceleration are radial","value":"C"},{"text":"Both velocity and acceleration are transverse","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252891,"question":"A particle revolves round a circular path with a constant speed. The accelerationof the particle is","choices":[{"text":"A. A long the circumference of the circle","value":"A"},{"text":"Along the tangent","value":"B"},{"text":"Along the radius","value":"C"},{"text":"Zero","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252889,"question":"Geo stationary satellite remains","choices":[{"text":"Stationary","value":"A"},{"text":"Both \"A\" &amp; \"B\"","value":"B"},{"text":"Appear","value":"C"},{"text":"None of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252886,"question":"Which statement about geostationary orbit is false?","choices":[{"text":"A geostationary orbit must be directly above the equator","value":"A"},{"text":"All satellite in a geostationary orbit must have the same masses","value":"B"},{"text":"The period of geostationary orbit must be 24 hours","value":"C"},{"text":"There is only one possible radius for a geostationary","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252885,"question":"When a particle moves in a uniform circular motion. It has:","choices":[{"text":"Radial velocity and radial acceleration","value":"A"},{"text":"Tangential velocity and radial acceleration","value":"B"},{"text":"Tangential velocity and tangential acceleration","value":"C"},{"text":"Radial velocity and tangential acceleration","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252884,"question":"The ratio of angular speeds of minute hand and hour hand of a watch is:","choices":[{"text":"1: 12","value":"A"},{"text":"6: 1","value":"B"},{"text":"12: 1","value":"C"},{"text":"1: 6","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252883,"question":"The geostationary satellite is:","choices":[{"text":"Stationary","value":"A"},{"text":"Rotating very fastly","value":"B"},{"text":"Rotating with the period of earth","value":"C"},{"text":"Rotating very slowly","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252882,"question":"The radius of orbit of a geostationary satellite depends upon:","choices":[{"text":"Mass of satellite and its time period","value":"A"},{"text":"Mass of satellite and mass of earth","value":"B"},{"text":"Mass of earth, mass of satellite and time period of satellite","value":"C"},{"text":"Mass of earth and time period of earth","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252881,"question":"A point on the rim of wheel 400 cm in diameter has a velocity of 1600 cms-1\r\n. The angular velocity of the wheel\r\nis:","choices":[{"text":"6 rad/s","value":"A"},{"text":"4 rad/s","value":"B"},{"text":"2 rad/s","value":"C"},{"text":"8 rad/s","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252880,"question":"In uniform circular motion, the factor that remains constant is:","choices":[{"text":"Linear velocity","value":"A"},{"text":"Acceleration","value":"B"},{"text":"Speed","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252879,"question":"A stone of mass 0.5kg tied with a string of length 1m is moving in a horizontal circle with a speed of 4ms-1\r\n. The\r\ntension acting on the string in newton is:","choices":[{"text":"2","value":"A"},{"text":"0.2","value":"B"},{"text":"8","value":"C"},{"text":"0.8","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252878,"question":"The work done to keep the satellite in the given orbit is.","choices":[{"text":"Zero","value":"A"},{"text":"infinity","value":"B"},{"text":"unit","value":"C"},{"text":"can’t be decided","value":"D"},{"value":"E"}],"correctAnswer":1}]