We are investergatting how many times a ball bounces on diffrent surfices.Me and my group are investergatting how many times a ball bouces on diffrent surfices.We are steel planning on where we are going to start.I wonde
r if we choses to start ours on cocret and then to grass?I wonder if the ball bounces less on the grass then concret?
r if we choses to start ours on cocret and then to grass?I wonder if the ball bounces less on the grass then concret? 
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