Why Ballistic missile fails in some circumstances of precision ?
Why Ballistic missile fails in some circumstances of precision ? A. due to their shapeB. due to air resistance C. due to angle of projection D. all of these
Why Ballistic missile fails in some circumstances of precision ? A. due to their shapeB. due to air resistance C. due to angle of projection D. all of these
Time rate of change of momentum is equal to____________________? A. force B. impulse C. velocity D. both A and C
At which angle the range of the projectile is maximum____________________? A. 45 B. 60 C. 30 D. none
Flight of a rocket in the space is an example of______________________? A. second law of motionB. third law of motion C. first law of motion D. law of gravitation
Distance covered by a freely falling body in 2 seconds will be__________________? A. 4.9 mB. 19.6 m C. 39.2 m D. 44.1 m
What is the angle of projection for which the range and maximum height become equal ? A. tan-1 ¼B. tan-1 4 C. tan-1 ½ D. tan-1 2
Taking off rocket can be explained by __________________? A. 1st law of motion B. 2nd law of motionC. Law of conservation of momentum D. law of conservation of energy
Which shows the correct relation between time of flight T and maximum height H ? A. H=gT2/8 B. H=8T2/g C. H=8g/T2 D. H=gT2
What is the shape of velocity, time graph for constant acceleration ? A. straight inclined line. B. parabola C. inclined curve D. declined curve
When car takes turn around a curve road, the passengers feel a force acting on them in a direction away from the center of the curve. It is due to__________________? A. Centripetal force B. Gravitational force C. Their inertiaD. Centrifugal…