[{"id":15488,"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° with the force of the smaller magnitude then their magnitude are:","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":15487,"question":"A motorist travels A to B at a speed at 40 km/h and returns at speed of 60 km/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":15486,"question":"The velocity of a particle at an instant is 10 m/s and after 5 s 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},{"id":15485,"question":"To get a resultant displacement of 10 m, two displacement vectors of magnitude 6 m and 8 m should be combined","choices":[{"text":"Parallel","value":"A"},{"text":"Antiparallel","value":"B"},{"text":"At angle 60°","value":"C"},{"text":"Perpendicular to each other","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":15484,"question":"The dot product of two vectors is negative when","choices":[{"text":"They are parallel vectors","value":"A"},{"text":"They are anti-parallel vectors","value":"B"},{"text":"They are perpendicular vectors","value":"C"},{"text":"None of the above is correct","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":15483,"question":"If two non-zero vector ̅A̅ and ̅B are parallel to each other, then ̅A̅, ̅B is equal to","choices":[{"text":"Zero","value":"A"},{"text":"AB","value":"B"},{"text":"A + B","value":"C"},{"text":"A - B","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":15482,"question":"If the dot product of two non-zero vectors vanishes the vectors will be","choices":[{"text":"In the same direction","value":"A"},{"text":"Opposite to each other","value":"B"},{"text":"Perpendicular to each other","value":"C"},{"text":"Zero","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":15481,"question":"Two forces of 10N and 15N are acting simultaneously on an object in the same direction. Their resultant is","choices":[{"text":"Zero","value":"A"},{"text":"5N","value":"B"},{"text":"25N","value":"C"},{"text":"150N","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":15480,"question":"Two forces are acting together on an object. The magnitude of their resultant is minimum when the angle between the force is.","choices":[{"text":"0°","value":"A"},{"text":"60°","value":"B"},{"text":"120°","value":"C"},{"text":"180°","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":15479,"question":"A force of 10N is acting along y-axis its component along x-axis is","choices":[{"text":"10N","value":"A"},{"text":"20N","value":"B"},{"text":"100N","value":"C"},{"text":"Zero N","value":"D"},{"value":"E"}],"correctAnswer":4}]