##### Across

**4.**gram and kilogram**7.**motion of an object travelling into the air or being thrown along the earth's surface.**8.**rate of change of velocity**9.**refers to how close measurements of the same item are to each other**10.**force that requires contact on both objects to occur.**12.**energy cannot be created nor destroyed.**14.**unit of force and weight.**16.**rate of doing work**17.**force in the opposite direction of the object in air or fluid.**19.**mass multiplied to gravity**21.**product of force and distance.**22.**magnitude only**25.**product of force and time.**27.**how far or close is the moving object or body.**29.**change in position of an object**30.**negative acceleration

##### Down

**1.**conservations of momentum and conservation of kinetic energy are observed.**2.**path of projectile motion**3.**km, m, cm and mi**5.**product of mass and velocity**6.**two objects interact without any physical contact with each other.**11.**a body is at rest or moving at a constant speed in a straight line.**13.**physical quantity with magnitude and direction**15.**motion of projectile along y-axis**18.**a force created by two surfaces that contact and slide against each other.**20.**motion of projectile along x-axis**23.**a numerical value describing how a physical system has changed over time.**24.**cm**26.**path taken up by a moving object that is following through space as a function of time**28.**ability to do work