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1)______cannot be seen but its effect can be seen or felt. If you
push on something or pull on it, then you are applying a force to it. Force makes things move
or, more accurately, makes things change their

(2)_________

(3)_________are equal in size and opposite in direction. When forces are
balanced, there is no change in motion. However, if something starts to move, it must be
because

(4)_________are acting on it,
To have unbalanced forces means that the force applied in one direction is greater than
the force applied in the opposite direction. When unbalanced forces are acting on an object,
there is a change in

(5)______and/or

(6)________Force can affect the

(7)______of an object once it is applied. Also, force causes
stationary objects

(8)_______and moving objects to stop or change in direction, depending
on the strength of the force. The tendency of an object not to move unless a force acts on it is
called

(9)____________It is a property of all things which makes them resistant to change in
motion. In fact, the more

(10)________an object has, the more inertia it has.​​