if the range of a projectile is R then it's KE is max after (from start) a displacement equal to
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Answer:
Given :
▪ A body is projected from the ground.
▪ Maximum horizontal distance (Range) covered by body = R
To Find :
▪ Distance from initial postion where kinetic energy of body becomes minimum.
SoluTioN :
☞ Since mass of projectile is constant throughout the projectile motion therefore KE of body depends only on the velocity.
☞ Velocity is maximum at the points of projection and landing.
☞ Kinetic energy is maximum at that both points.
☞ Velocity is minimum at the top height of projectile.
☞ Maximum height is achieved at distance half of its maximum ranfe therefore velocity is minimum at a distance of R/2.
☞ Therefore, KE is also minimum at distance R/2.
Option-B ✔
Explanation:
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