Question

in a projectile, the velocity is how many times perpendicular to the acceleration during flight
a) only once
b) twice
c)thrice
d) four times
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Answer 1

Answer:

constant

Explanation:

In projectile motion horizontal component of velocity is always constant because acc. In this direction is zero. But velocity in vertical direction first decreases to zero and then continue to decrease in negative value. So once in the flight vertical component is zero only horizontal component of velocity is present. This means velocity perpendicular to acceleration which is vertical.