Science
Fill in the blank. Choose your answer inside the box.
7. Friction
is a special kind of force that keeps objects in place or slows them down.
8.
Force
is a push or pull that starts, stops or changes the direction of an object.
9.
is the pull of attraction towards the center of the earth.
10.
is the pull of gravity in any object.
11.
is the amount of matter in an object.
12. To overcome the difficulty of lifting heavy barrels, men have to use a machine called
Weight, Friction, Inclined Plane, Mass, Gravity​