(C) In projectile motion,there is no external horizontal force acting on the object (ignoring air resistance). According to Newton's second law,if the

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Horizontal component of momentum will be conserved.

(C) In projectile motion,there is no external horizontal force acting on the object (ignoring air resistance). According to Newton's second law,if the net external force in a direction is zero,the momentum in that direction remains constant. Since the horizontal component of velocity $v_x = V_0 \cos(30^o)$ remains constant throughout the flight,the horizontal component of momentum $p_x = m v_x$ is conserved. Therefore,the correct statement is that the horizontal component of momentum will be conserved.

Class 11 Physics 2 Motion in a Plane Horizontal Projectile Motion

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$A$ ball is projected with velocity $V_0$ at an angle of elevation $30^o$. Mark the correct statement.

A
Kinetic energy will be zero at the highest point of the trajectory.
B
Vertical component of momentum will be conserved.
C
Horizontal component of momentum will be conserved.
D
Gravitational potential energy will be minimum at the highest point of the trajectory.

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2 Motion in a Plane

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Horizontal Projectile Motion

Two projectiles are fired with the same initial speed from the same point on the ground at angles of $(45^{\circ}-\alpha)$ and $(45^{\circ}+\alpha)$,respectively,with the horizontal direction. The ratio of their maximum heights attained is:

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The equation of a projectile is $y = 16x - \frac{5x^2}{4}$. The horizontal range is .......... $m$.

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$A$ small ball is thrown at an angle $45^{\circ}$ to the horizontal with an initial velocity of $2 \sqrt{2} \ m/s$. The magnitude of the mean velocity averaged over the first $2 \ s$ is (take acceleration due to gravity $g = 10 \ m/s^2$). (in $m/s$)

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Three projectiles $A, B$ and $C$ are projected at an angle of $30^{\circ}, 45^{\circ}, 60^{\circ}$ respectively. If $R_{A}, R_{B}$ and $R_{C}$ are the ranges of $A, B$ and $C$ respectively,then (velocity of projection is the same for $A, B$ and $C$):

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$A$ projectile is thrown with velocity $u$ making an angle $\theta$ with the vertical. It just crosses the tops of two poles each of height $h$ after $1\,s$ and $3\,s$,respectively. The maximum height of the projectile is ............ $m$.

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$A$ ball is projected with velocity $V_0$ at an angle of elevation $30^o$. Mark the correct statement.

Similar Questions

Two projectiles are fired with the same initial speed from the same point on the ground at angles of $(45^{\circ}-\alpha)$ and $(45^{\circ}+\alpha)$,respectively,with the horizontal direction. The ratio of their maximum heights attained is:

The equation of a projectile is $y = 16x - \frac{5x^2}{4}$. The horizontal range is .......... $m$.

$A$ small ball is thrown at an angle $45^{\circ}$ to the horizontal with an initial velocity of $2 \sqrt{2} \ m/s$. The magnitude of the mean velocity averaged over the first $2 \ s$ is (take acceleration due to gravity $g = 10 \ m/s^2$). (in $m/s$)

Three projectiles $A, B$ and $C$ are projected at an angle of $30^{\circ}, 45^{\circ}, 60^{\circ}$ respectively. If $R_{A}, R_{B}$ and $R_{C}$ are the ranges of $A, B$ and $C$ respectively,then (velocity of projection is the same for $A, B$ and $C$):

$A$ projectile is thrown with velocity $u$ making an angle $\theta$ with the vertical. It just crosses the tops of two poles each of height $h$ after $1\,s$ and $3\,s$,respectively. The maximum height of the projectile is ............ $m$.

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