[{"id":121838,"question":"A 120 m long train is moving in a direction with speed 20 m/s. A train B moving with 30 m/s in the opposite direction and 130 m long crosses the first train in a time","choices":[{"text":"6 s","value":"A"},{"text":"36 s","value":"B"},{"text":"38 s","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":121835,"question":"A ball of mass m moving with uniform speed collides elastically with another stationary ball. The incident ball will lose maximum kinetic energy when mass of the stationary ball is","choices":[{"text":"m","value":"A"},{"text":"2 m","value":"B"},{"text":"4 m","value":"C"},{"text":"Infinity","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":121833,"question":"A car moves for half of its time at 80 km/h and rest half of time at 40 km/h, The total distance covered is 60 km. What is the average speed of the car?","choices":[{"text":"60 km/hr","value":"A"},{"text":"80 km/hr","value":"B"},{"text":"120 km/hr","value":"C"},{"text":"180 km/hr","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":121831,"question":"An airplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically above a point A on the ground, a bomb is released from it. The bomb strikes the ground, at point B. The distance AB is","choices":[{"text":"1200 m","value":"A"},{"text":"0.33 km","value":"B"},{"text":"3.33 km","value":"C"},{"text":"33 km","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":121829,"question":"For a moving body, at any instant of time","choices":[{"text":"If the body is not moving the acceleration is necessarily zero","value":"A"},{"text":"If the body is slowing, the retardation is negative","value":"B"},{"text":"If the body is slowing, the distance is negative","value":"C"},{"text":"If displacement, velocity and acceleration at that instant are known, we can find the displacement at any given time in future","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":121827,"question":"A body walks to his school at a distance of 6 km with a speed of 2.5 km/h and walks back with a constant speed of 5 km/h. His average speed for round trip expressed in km/h is","choices":[{"text":"24/13","value":"A"},{"text":"10/3","value":"B"},{"text":"3","value":"C"},{"text":"4,8","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":121825,"question":"A ball is thrown upwards with a velocity of 100 m/s. It will reach the ground after","choices":[{"text":"10 s","value":"A"},{"text":"20 s","value":"B"},{"text":"5 s","value":"C"},{"text":"40 s","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":121823,"question":"At the top of the trajectory of a projectile the acceleration is","choices":[{"text":"The maximum","value":"A"},{"text":"The minimum","value":"B"},{"text":"Zero","value":"C"},{"text":"g","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":121821,"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 body can change when its acceleration is constant","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":121819,"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":121817,"question":"What will be the ratio of the distance moved by a freely falling body from rest in 4th and 5th 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":121816,"question":"A train of 150 m length is going towards north direction at a speed of 10 ms<sup>-1</sup>. A parrot files 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},{"id":121815,"question":"The sum of the magnitude of two forces acting at a point is 18 and the magnitude of their resultant is 12. If the resultant is at 90<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">° with the force of the smaller magnitude, then their magnitudes are</span>","choices":[{"text":"3, 15","value":"A"},{"text":"4, 14","value":"B"},{"text":"5, 13","value":"C"},{"text":"6, 12","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":121813,"question":"A motorist travels A to B at a speed at 40 km/h and returns at speed of 60km/h. His average speed will be","choices":[{"text":"40 km/h","value":"A"},{"text":"48 km/h","value":"B"},{"text":"50 km/h","value":"C"},{"text":"60 km/h","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":121810,"question":"In velocity of a particle at an instant is 10 m/s and after 5s the velocity of the particle is 20 m/s. The velocity 3s before in m/s is","choices":[{"text":"8","value":"A"},{"text":"4","value":"B"},{"text":"6","value":"C"},{"text":"7","value":"D"},{"value":"E"}],"correctAnswer":2}]