Motion in a Plane — Physics STD 11 Science — Question
Maharashtra BoardEnglish MediumSTD 11 SciencePhysicsMotion in a Plane4 Marks
Question
Write a note on projectile motion.
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Answer
$1.$ An object in flight after being thrown with some velocity is called a projectile and its motion is called projectile motion.
$2.$ Example: A bullet fired from a gun, football kicked in air, a stone thrown obliquely in air etc.
$3.$ In projectile motion, the object is moving freely under the influence of Earth’s gravitational field.
$4.$ The projectile has two components of velocity, one in the horizontal i.e., along the $x-$direction and the other in the vertical i.e., along the $y-$direction.
$5.$ As acceleration due to gravity acts only along the vertically downward direction, the vertical component changes in accordance with the laws of motion with $a_x = 0$ and $a_y = -g.$
$6.$ As no force is acting in the horizontal direction, the horizontal component of velocity remains unchanged.
$[$Note: Retarding forces like air resistance etc. are neglected in projectile motion unless otherwise stated.$]$
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