In projectile motion, the modulus of rate of change of velocity

  • A

    is constant

  • B

    first increases then decreases

  • C

    first decreases then increases

  • D

    None of the above

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At what angle the particle should be projected to cover maximum range ?

Range of a bullet fired at $45^o$ to horizontal is $980m$. If the bullet is fired at same  angle from a car travelling horizontally at $18\, km/hr$ towards target then range will be  increased by :-

At what angle of elevation, should a projectile be projected with velocity $20 \,ms ^{-1}$, so as to reach a maximum height of $10 \,m$ ?

The position of a projectile launched from the origin at $t = 0$ is given by $\vec r = \left( {40\hat i + 50\hat j} \right)\,m$ at $t = 2\,s$. If the projectile was launched at an angle $\theta$ from the horizontal, then $\theta$ is (take $g = 10\, ms^{-2}$)

  • [JEE MAIN 2014]

A projectile cover double range as compare to its maximum height attained. The angle of  projection is