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Discuss a circumstance in which angle between velocity and acceleration is less than 90.
Discuss a circumstance in which angle between velocity and acceleration lies batween 180 and 90.
(Hifsa Zafar asked this)
Answer:
In projectile motion when the object is moving up, the angle between velocity and acceleration (due to gravity g) is between 90 degree and 180 degree.
during the downward motion of a projectile, the angle between velocity and acceleration is between 0 and 90 degree.
