[{"id":15498,"question":"Two bodies of masses m<sub>1</sub> and m<sub>2</sub> have equal momentum their kinetic energies E<sub>1</sub> and E<sub>2</sub> are in the ratio","choices":[{"text":"√m<sub>1</sub> :&nbsp;√m<sub>2</sub>","value":"A"},{"text":"<span style=\"font-size: 14.44444465637207px;\">m</span><sub>1 </sub>:&nbsp;<span style=\"font-size: 14.44444465637207px;\">m</span><sub>2</sub>","value":"B"},{"text":"<span style=\"font-size: 14.44444465637207px;\">m</span><sub>2 </sub>:&nbsp;<span style=\"font-size: 14.44444465637207px;\">m</span><sub>1</sub>","value":"C"},{"text":"<span style=\"font-size: 14.44444465637207px;\">m</span><sub>1</sub><sup>2</sup>&nbsp;:&nbsp;<span style=\"font-size: 14.44444465637207px;\">m</span><sub>2</sub><sup>2</sup>","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":15497,"question":"A body of mass 2 kg is thrown up vertically with K.E of 490 joules If the acceleration due to gravity is 9.8 m/s<sup>2</sup> the height at which the K.E of the body becomes half its original value is give by:","choices":[{"text":"50 m","value":"A"},{"text":"12.5 m","value":"B"},{"text":"25 m","value":"C"},{"text":"10 m","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":15496,"question":"A body moves a distance of 10 m along a straight line under the action of a force of 5 Newtons, if the work done is 25 joules the angle which the force takes with the direction of motion of the body is:","choices":[{"text":"0°","value":"A"},{"text":"30°","value":"B"},{"text":"60°","value":"C"},{"text":"90°","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":15495,"question":"Two masses of 1 g and 4 g are moving with equal kinetic energies The ratio of the magnitudes of their linear moments is:","choices":[{"text":"4 : 1","value":"A"},{"text":"√2 : 1","value":"B"},{"text":"1 : 2","value":"C"},{"text":"1 : 16","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":15494,"question":"Which of the following four statements is false?","choices":[{"text":"A body can have zero velocity and still be accelerated","value":"A"},{"text":"A body can have a constant velocity and still have a varying speed","value":"B"},{"text":"A body can have a constant speed and still have a varying velocity","value":"C"},{"text":"The direction of the velocity of a acceleration is constant","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":15493,"question":"The initial velocity of a body moving along a straight line in 7 m/s. It has a uniform acceleration of 4 m/s<sup>2</sup>. The distance covered by the body in the 5th second of its motion is","choices":[{"text":"25 m","value":"A"},{"text":"35 m","value":"B"},{"text":"50 m","value":"C"},{"text":"85 m","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":15492,"question":"The acceleration 'a' in m/s<sup>2</sup> of a particle is given by a = 3 t<sup>2</sup> + 2 t + 2,where 't' is the time if the particle starts out with a velocity v = 2 m/s at t = 0, then the velocity at the end of 2 second is","choices":[{"text":"12 m/s","value":"A"},{"text":"24 m/s","value":"B"},{"text":"18 m/s","value":"C"},{"text":"36 m/s","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":15491,"question":"A body is dropped from a tower with zero velocity reaches ground in 4s. The height of the tower is about","choices":[{"text":"80 m","value":"A"},{"text":"20 m","value":"B"},{"text":"160 m","value":"C"},{"text":"40 m","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":15490,"question":"What will be the ratio of the distance moved by a freely falling body from rest in 4<sup>th</sup> and 5<sup>th</sup> seconds of journey?","choices":[{"text":"4 : 5","value":"A"},{"text":"7 : 9","value":"B"},{"text":"16 : 25","value":"C"},{"text":"1 : 1","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":15489,"question":"A train of 150 m length is going towards north direction at a speed of 10 ms<sup>-1</sup> A parrot flies at a speed of 5 ms<sup>-1</sup> towards south direction parallel to the railway track,The time taken by the parrot to cross the train is equal to","choices":[{"text":"12 s","value":"A"},{"text":"8 s","value":"B"},{"text":"15 s","value":"C"},{"text":"10 s","value":"D"},{"value":"E"}],"correctAnswer":4}]