Q.No.3.13: - At what point or points in its path does a projectile have its minimum speed, its maximum speed?
Ans: - (i) The speed of projectile is minimum at the maximum height because the vertical component is zero at the maximum height.
(ii) The speed of a projectile is maximum at the point of projection and also just before it strikes the ground (level of projection) because the vertical component of velocity vy is maximum at these points.
At maximum height the speed of projectile is minimum but its speed is maximum at the point of projection and at the landing point. Now the question is at what point the projectile has max speed? at projection or at landing.? The answer is if ignore the air fricion then at both points the speed will be equall. But in real practice there is air offering resistance so the speed at landing will be smaller than projection.
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