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I believe that bigger and heifer balls are harder to push

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I think one ball will be harder to roll because it is heavier

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I believe one type of ball is harder to roll than another type of ball because of differences in mass.

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I believe that one type of ball is harder to roll because of its weight.
The more weight the balk has the force needed to roll it will be greater.

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I think one type of ball harder to roll than other because of the mass or the shape it look like. For example, the bowling ball is harder to roll than a soccer ball because bowling ball is heavy than the soccer that made it  harder to roll.

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I think one type of ball is harder to roll than another because of shape, material, and mass.

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I think that one ball is harder to roll than the other due to how light or heavy it is. Basically, the ball’s mass contributes to how easy you can roll it.

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I think that one type of ball is harder to roll than the other because the one with the greater mass is harder to roll than a ball with less mass.

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I think one type of ball might be harder to roll because of the mass of the ball.If the mass of the ball is higher the more effort you will need to put in it to make it roll

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I think that one ball is harder to roll than another because each ball has a different mass.

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I think that one type of ball is harder to roll than the others because of their shape and material of the ball.

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I think one type of ball is harder to roll than the other due to the material, texture, or mass.

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I think that one type of ball is harder to roll than the other because of how the material was made with it.

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One type of ball is harder to roll than others because different kinds of balls have different mass

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I believe that one ball is harder to roll because it could be heavier or it could also be lopsided.

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I think a ball will roll “harder” than another because one ball has more mass than the other.

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The type of ball can be harder to roll than another because of mass and material.

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One type of ball is harder to roll than another because every ball has a different amount of mass. The mass thus affects how much force you need to exert: the more mass, the more force. Therefore, “heavier” balls are harder to roll than “lighter” balls.

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I believe that some balls are harder to roll than others due to the fact that different types of balls have different types of mass. Having heavier mass uses more energy/force to move it.

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I believe that one ball is harder to move than another based on its surface and it’s mass. For example, a bowling ball has a smooth surface and a heavy mass.

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I think that one balls are harder to roll than others because one  heavy ball would need more momentum than a lighter ball to get it to move but more energy to stop than a lighter ball.

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I think one ball is heavier because of the material that is giving its weight therefore making one easier to roll than the other.

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One ball is harder to move because one ball is heavier than the other.

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I think that one type of ball is harder to roll than the other because some balls have more or less mass (heavier/lighter), so the balls with more mass are harder to roll.

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I think that one type of ball is harder to roll than the other because of the difference in their mass.

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I think that one type of ball is harder to roll than the other because it might have more mass or be bigger than the other ball.

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I think that one type of ball is harder to roll than others because of mass of the ball and the strength of the organism that is rolling the ball.

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I think one type of ball is harder to roll because it could be heavier and need more energy to make it roll.

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I think one ball is harder to roll than the others because of their mass.

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I think heavier balls are harder to roll than lighter balls because of the mass

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I think one type of ball is harder to roll than another because of the material it was made with or the weight of the ball.

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I think one type of ball is harder to roll than the other because if a ball is heavier than the other it would depend on one’s strength to roll it.

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I think one ball is harder to roll than the other due to the mass of the ball and the material it is made of.

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I think balls made with heavier material don’t bounce or roll often becuase of the mass.

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I think one ball is harder to roll than another because said ball has more mass than another ball.

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I think one type of ball is harder to roll than the other because the weight of the ball, material type, and shape of it affects the way it rolls. Less friction and force?