A projectile has maximum range of 40 m on a horizontal plane. If angle of projection is a and the time of flight is 1 second, then sin a must be about__________________?

Related Mcqs:

1. If the direction of projection bisects the angle between the vertical and the inclined plane, then the range of projectile on the inclined plane is__________________?

   A. zero
   B. maximum
   C. minimum
   D. unpredictable

2. The angle of projection at which the horizontal range and maximum height of a projectile are equal to___________________?

   A. 45°
   B. tan-1 (2)
   C. tan-‘ (4)
   D. tan”1 (1/4)

3. The angle of projection at which the horizontal range and maximum height of a projectile are equal to_____________________?

   A. 36°
   B. 45°
   C. 56°
   D. 76°

4. For a given velocity of a projectile, the range is maximum when the angle of projection is___________________?

   A. 30°
   B. 45°
   C. 90°
   D. 0°

5. If a projectile is fired with an initial velocity of 10 m/sec at an angle of 60° to the horizontal, its horizontal and vertical velocity at the highest point of trajectory are___________________?

   A. 0 and 5 m/sec
   B. 5 m/sec and 0
   C. 5 V3 m/sec and 0
   D. 5 and 5V3 m/sec

6. A stone is thrown up a slope of inclination 60° to the horizontal. At what angle to the slope must the stone be thrown so as to land as far as possible from the point of projection ?

   A. 15°
   B. 30°
   C. 45°
   D. 75°

7. The maximum value of the horizontal range for a projectile projected with a velocity of 98 m/sec is__________________?

   A. 98 m
   B. 490 m
   C. 980 m
   D. 1960 m

8. If a body is lying on a plane whose inclination with the horizontal is less than the angle of friction, then___________________?

   1) a force is required to move the body upwards
   2) a force is required to move the body downward
   3) the body will not be in equilibrium
   The correct answer is?

   A. only (1)
   B. only (2)
   C. both (1) and (2)
   D. both (1) and (3)

9. A shell travelling with a horizontal velocity of 100 m/sec explodes and splits into two parts, one of mass 10 kg and the other of 15 kg. The 15 kg mass drops vertically downward with initial velocity of 100 m/sec and the 10 kg mass begins to travel at an angle to the horizontal of tan”1 x, where x is______________________?

   A. 3/4
   B. 4/5
   C. 5/3
   D. 3/5

10. A car goes round a curve of radius 100 m at 25 m/sec. The angle to the horizontal at which the road must be banked to prevent sideways friction on the car wheels is tan”1 x, where x is (Assume g = 10 m/sec2)_____________________?

    A. 3/8
    B. 1/2
    C. 9/5
    D. 5/8