For a body projected at an angle with the horizontal from the ground,choose the correct statement.

  • A
    Gravitational potential energy is maximum at the highest point.
  • B
    The horizontal component of velocity is zero at the highest point.
  • C
    The vertical component of momentum is maximum at the highest point.
  • D
    The kinetic energy $(K.E.)$ is zero at the highest point of projectile motion.

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One second after projection, a projectile is travelling in a direction inclined at $45^{\circ}$ to the horizontal. After two more seconds, it is travelling horizontally. Then the magnitude of the initial velocity of the projectile is $(g = 10 \,ms^{-2})$

$A$ projectile can have the same range for two angles of projection. If $h_1$ and $h_2$ are the maximum heights when the range in the two cases is $R$,then the relation between $R$,$h_1$,and $h_2$ is:

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For a projectile motion, the range $R$ is '$n$' times the maximum height $H$. So the angle of projection is

Two projectiles $A$ and $B$ are thrown with initial velocities of $40\,m/s$ and $60\,m/s$ at angles $30^{\circ}$ and $60^{\circ}$ with the horizontal respectively. The ratio of their ranges is $(g = 10\,m/s^2)$.

Two identical bodies, projected with the same speed at two different angles cover the same horizontal range $R$. If the time of flight of these bodies are $5 \text{ s}$ and $10 \text{ s}$, respectively, then the value of $R$ is . . . . . . $\text{m}$. (Take $g = 10 \text{ m/s}^2$)

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