A ball is kicked upwards at an angle of 45° to horizontal ground. After a short flight, the ball returns to the ground.
It may be assumed that air resistance is negligible.
What is never zero during the flight of the ball?
1 )
the horizontal component of the ball’s acceleration
the horizontal component of the ball’s velocity
3 )
the vertical component of the ball’s momentum
4 )
the vertical component of the ball’s velocity
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