A stone is thrown vertically upwards, reaches a highest point, and returns to the ground. When the stone is at the top of its path, its acceleration __________.

is directed upwards
changes direction from upwards to downwards
is directed downwards
is zero

Question

A stone is thrown vertically upwards, reaches a highest point, and returns to the ground. When the stone is at the top of its path, its acceleration __________.

	is directed upwards
	changes direction from upwards to downwards
	is directed downwards
	is zero

anonymous · Answer

@bennyboy489

anonymous · Answer

it is zero, but only for a fraction of a second, where there is not any kinetic energy, but only gravitational potential energy

anonymous · Answer

thank you :D

anonymous · Answer

it has an acceleration directed downward due to gravity

anonymous · Answer

Yes, @deepakrathee is correct.  From the moment the stone is released, it's acceleration is downward.  That acceleration is the acceleration of gravity, and it is never zero.