Complete the passage to describe projectile motion, using “horizontal” or “vertical.” When an object is thrown, the thrower push
es the object. This causes the object to move in a motion. Inertia keeps the ball moving horizontally. The force of gravity acts on the object, causing motion. These two motions cause the motion of the object to curve downward.
Our bones support us and allow us to move. Muscles pull on the joints, allowing us to move. Our bones help hold our bodies in place. They need eachtoher. The muscles need the bones for stability.
