[{"id":119392,"question":"An object thrown upward with an initial velocity at certain angle with the horizontal and moving freely under the action of gravity is called","choices":[{"text":"a rocket","value":"A"},{"text":"an aeroplane","value":"B"},{"text":"a projectile","value":"C"},{"text":"a ballon","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119386,"question":"Distance covered by a freely falling body in 2 sec will be","choices":[{"text":"4.9 m","value":"A"},{"text":"19.6 m","value":"B"},{"text":"29.2 m","value":"C"},{"text":"44.1 m","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119384,"question":"The artillery shells travel along parabolic paths under the influence of","choices":[{"text":"magnetic field","value":"A"},{"text":"electric field","value":"B"},{"text":"electromagnetic field","value":"C"},{"text":"gravitational field","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":119382,"question":"An object thrown in arbitrary direction in space with an initial velocity and moving freely under gravity will follow","choices":[{"text":"a circular path","value":"A"},{"text":"a straight line","value":"B"},{"text":"a hyperbola","value":"C"},{"text":"a parabola","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":119380,"question":"The motion of a projectile is","choices":[{"text":"one dimension","value":"A"},{"text":"two dimension","value":"B"},{"text":"three dimension","value":"C"},{"text":"all of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119378,"question":"The motion in a plane is the motion in","choices":[{"text":"one dimension","value":"A"},{"text":"two dimension","value":"B"},{"text":"three dimension","value":"C"},{"text":"four dimension","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119376,"question":"The motion of a body in a straight line is the motion in","choices":[{"text":"one dimension","value":"A"},{"text":"two dimension","value":"B"},{"text":"three dimension","value":"C"},{"text":"four dimension","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":119374,"question":"If m is the mass of the gases ejected per second with velocity v relative to the rocket of mass M, then the acceleration of rocket is","choices":[{"text":"a = M/mv","value":"A"},{"text":"a = mM/v","value":"B"},{"text":"a = mv/M","value":"C"},{"text":"a = v/mm","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119372,"question":"A rocket carries its own fuel in the form of","choices":[{"text":"liquid only","value":"A"},{"text":"liquid or solid","value":"B"},{"text":"liquid and solid","value":"C"},{"text":"liquid or solid and oxygen","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":119370,"question":"A typical rocket consists of fuel","choices":[{"text":"more than 60% of launch mass","value":"A"},{"text":"less than 60% of launch mass","value":"B"},{"text":"less than 80% of launch mass","value":"C"},{"text":"more than 80% of launch mass","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":119368,"question":"A typical rocket ejects the burnt gases at speeds over","choices":[{"text":"400 ms<sup>-1</sup>","value":"A"},{"text":"40000m s<sup>-1</sup>","value":"B"},{"text":"40000 ms<sup>-1</sup>","value":"C"},{"text":"60000 ms<sup>-1</sup>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119366,"question":"A typical rocket consumes about","choices":[{"text":"100 kg s<sup>-1</sup>of fuel","value":"A"},{"text":"1000 kg s<sup>-1</sup>of fuel","value":"B"},{"text":"10000 kg s<sup>-1</sup>of fuel","value":"C"},{"text":"100000 kg s<sup>-1</sup>of fuel","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119365,"question":"Flight of rocket in the space is an example of","choices":[{"text":"Newton's first law","value":"A"},{"text":"Newton's third law","value":"B"},{"text":"Newton's second law","value":"C"},{"text":"all of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119364,"question":"When a shall explodes a mid-air, the total momentum of its fragments is","choices":[{"text":"less than the momentum of shell","value":"A"},{"text":"equal to the momentum of shell","value":"B"},{"text":"greater than the momentum of shell","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119363,"question":"When a shell explodes in mid-air, its fragments fly off in","choices":[{"text":"only one direction","value":"A"},{"text":"in two direction","value":"B"},{"text":"different directions","value":"C"},{"text":"a particular direction","value":"D"},{"value":"E"}],"correctAnswer":3}]