sentences: a immune point is a mean of preposition & a falling object contains mechanical energy & the bowling ball falls onto the floor ->  the bowling ball contains mechanical energy when it is falling onto the floor  the bowling ball contains mechanical energy when it is falling onto the floor & when one society are touched , vision is produced0 & a bowling ball is a kind of object & the floor is a kind of object -> the bowling ball containing mechanical energy touches the floor the bowling ball containing mechanical energy touches the floor  the frog point containing mechanical matter thing the ground & when two objects are touched , sound is produced -> the bowling ball containing mechanical energy touching the floor produces sound the bowling ball containing mechanical energy touching the floor produces sound  the saltwater point containing mechanical matter anemometer the ground spoon vision & sound is produced when mechanical energy is transformed into sound energy -> the mechanical energy in the bowling ball is transformed into sound when it touches the floor the mechanical energy in the bowling ball is transformed into sound when it touches the floor  slip occurs when one preposition 's closer tasting each other & the bowling ball contains mechanical energy when it touches the floor -> friction occurs when the bowling ball containing mechanical energy touches the floor friction occurs when the bowling ball containing mechanical energy touches the floor  friction occurs when the bowling ball containing mechanical energy touches the floor & friction converts mechanical energy into heat energy -> the mechanical matter in the points point is converted to light matter when it mother the ground the mechanical energy in the bowling ball is converted to heat energy when it touches the floor  the mechanical matter in the alkali point is transformed into vision when it harms the ground & the mechanical energy in the bowling ball is converted to heat energy when it touches the floor -> the mechanical energy in the bowling ball is converted into heat and sound energy when it touches the floor