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PART - | : OBJECTIVE QUESTIONS
* Marked Questions are having more than one correct option.
Section (A) : Definition, Projectile on a horizontal plane
At.
A3.
A-4.
AS.
AG.
AT.
a9.
A-10.
Att.
A particle move along the parabolic path x = y? + 2y +2 in such a way that the y-component of velocity
vector remains 5m/s during the motion. The magnitude of the acceleration of the particle is :
(A) 50 m/s? (B) 100 mis* (C)10 ya mis? (D) 0.4 mvs?
It 4 seconds be the time in which a projectile reaches a point P of its path and 5 seconds the time from
Pill itreaches the horizontal plane through the point of projection . The height of P above the horizontal
plane will be - [ g = 9.8 m/sec? ]
(A) 98 meters (B) 49 meters (C) 196 meters (D) 147 meters
During projectile motion, acceleration of a particle at the highest point of its trajectory is
(Ag (8) zero
(C) less than g (D) dependent upon projection velocity
In case of an oblique projectile, the velocity is perpendicular to acceleration :
(A) Once only 8) Twice (©) Never (0) Four times
The velocity of projection of a projectile is (61 + 8]) ms~. The horizontal range of the projectile is
(A) 49m (8) 96m (C) 196m (0) 14m
A projectile is fired with velocity u making angle 0 with the horizontal. What is the change in velocity
(from initial) when it is at the highest point :
(A) u cos0 (Bu (C) u sino (D) (u cos0 — u)
A projectile can have the same range R for two angles of projection. If t, and t, be the times of flight in
two cases, then the product of two times of flight is :
(A) tt, & R? (Bt eR (©) tt «an (0) to «
R’
In case of projectile motion if two projectiles A and B are projected with same speed at angles 15° and
75° respectively to the horizontal then :
(AH, > He @) Hy < He ()T>Ts ()T.
makes an angle 0 = 45° with positive x-axis.
{C) The instant of time tll which (starting from t = 0)
component of displacement along x-axis become halt
the range on inclined plane is
(D) Time of fight on inclined plane is ®)
