Question

What is projectile Derive an expression for the time of flight

Answer 1

An object thrown vertically up with some speed, its velocity will be decreasing and its velocity becomes zero when it attains the maximum height and then returns down with increasing velocity.If an object is thrown at angle to the vertical with some speed, its velocity will be decreasing and its velocity becomes zero when it attains the maximum height and then returns down with increasing velocity.The difference between the former and latter is that in the latter case it moves horizontally through some distance while duplicating the vertical fall of the former case.In terms of velocity, the object has two velocities one in the vertical direction and another in the horizontal direction.Thehorizontal velocitydoes not change in with time while thevertical velocity

Total time for which the object is in flight

It is denoted byT.

Total time of flight = Time of ascent + Time of descent

∴T=t+t= 2t Time of ascent = Time of descent =t]


At the highest pointH, the vertical component of velocity becomes zero. For vertical motion of the object (from 0 toH),

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Answer 2

PROJECTILE-a thrown object moving under influence of gravity and air resistance or in gravity and, The motion will be projectile.

Time of flight is given by
T= 2Uy/g