Question

For a ball to roll up a hill and then back down, its acceleration must change. is this true

Answer 1

imagine ^
do you think the speed of the ball changes when it goes up and down the hill?

Answer 2

wouldn't it stay the same?

Answer 3

speed has to reach zero between the point the ball rolls up the hill and back down

Answer 4

so its true

Answer 5

the ball gets slower as it goes up the hill, and faster as it goes down the hill

Answer 6

thats what i thought because it changes

Answer 7

False. The ball has some initial velocity, but gravity is the constant force slowing then reversing the ball's direction, right?

Answer 8

and gravity is a constant acceleration

Answer 9

oh ya o: forgot that the question's asking about a -_-