A projectile is launched from a point at height h>0 above horizontal ground with speed u at angle θ. It strikes the ground after time T.Which statement about the average velocity over the complete flight is correct?
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Question

A projectile is launched from a point at height h>0 above horizontal ground with speed u at angle θ. It strikes the ground after time T.Which statement about the average velocity over the complete flight is correct?

Options

G1 Physics · Accepted Answer

Average velocity is v⃗_avg = displacement vector / T. Over the complete flight, Δx = R, Δy = -h. Therefore, v⃗_avg = (R/T)î - (h/T)ĵ. Because h>0 and T is finite, the vertical component is -h/T ≠ 0. Hence the average velocity cannot be horizontal.

A projectile is launched from a point at height h&gt;0 above horizontal ground with speed u at angle θ. It strikes the ground after time T.Which statement about the average velocity over the complete flight is correct?

A projectile is launched from a point at height h>0 above horizontal ground with speed u at angle θ. It strikes the ground after time T.Which statement about the average velocity over the complete flight is correct?