An aeroplane moving horizontally with a speed of 720 *km/h* drops a food pocket, while flying at a height of 396.9 *m*. the time taken by a food pocket to reach the ground and its horizontal range is (Take *g* = 9.8 *m/sec*^{2})

(1) 3 *sec* and 2000 *m*

(2) 5 *sec* and 500 *m*

(3) 8 *sec* and 1500 *m*

(4) 9 *sec* and 1800 *m*

Concept Questions :-

Projectile motion

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A particle (*A*) is dropped from a height and another particle (*B*) is thrown in horizontal direction with speed of 5 *m/sec* from the same height. The correct statement is

(1) Both particles will reach at ground simultaneously

(2) Both particles will reach at ground with same speed

(3) Particle (*A*) will reach at ground first with respect to particle (*B*)

(4) Particle (*B*) will reach at ground first with respect to particle (*A*)

PMT - 2002

Concept Questions :-

Projectile motion

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A bomber plane moves horizontally with a speed of 500 *m/s* and a bomb is released from it. The bomb strikes the ground in 10 sec. Angle at which it strikes the ground will be (*g* = 10 *m*/*s*^{2})

(1) ${\mathrm{tan}}^{-1}\left(\frac{1}{5}\right)$

(2) $\mathrm{tan}\left(\frac{{\displaystyle 1}}{{\displaystyle 5}}\right)$

(3) tan^{–1}(1)

(4) tan^{–1}(5)

Concept Questions :-

Projectile motion

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A projectile fired with initial velocity *u* at some angle θ has a range *R*. If the initial velocity be doubled at the same angle of projection, then the range will be

(1) 2 *R*

(2) *R*/2

(3) *R*

(4) 4 *R*

Concept Questions :-

Projectile motion

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If the initial velocity of a projectile be doubled, keeping the angle of projection same, the maximum height reached by it will

(1) Remain the same

(2) Be doubled

(3) Be quadrupled

(4) Be halved

Concept Questions :-

Projectile motion

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In the motion of a projectile freely under gravity, its

(1) Total energy is conserved

(2) Momentum is conserved

(3) Energy and momentum both are conserved

(4) None is conserved

Concept Questions :-

Projectile motion

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The range of a projectile for a given initial velocity is maximum when the angle of projection is 45°. The range will be minimum, if the angle of projection is

(1) 90°

(2) 180°

(3) 60°

(4) 75°

Concept Questions :-

Projectile motion

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A ball is thrown upwards and it returns to ground describing a parabolic path. Which of the following remains constant

(1) Kinetic energy of the ball

(2) Speed of the ball

(3) Horizontal component of velocity

(4) Vertical component of velocity

PMT - 2001

Concept Questions :-

Projectile motion

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At the top of the trajectory of a projectile, the directions of its velocity and acceleration are

(1) Perpendicular to each other

(2) Parallel to each other

(3) Inclined to each other at an angle of 45°

(4) Antiparallel to each other

Concept Questions :-

Projectile motion

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An object is thrown along a direction inclined at an angle of 45° with the horizontal direction. The horizontal range of the particle is equal to

(1) Vertical height

(2) Twice the vertical height

(3) Thrice the vertical height

(4) Four times the vertical height

PMT - 1985

Concept Questions :-

Projectile motion

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