A force is a push or pull on an object that can cause the object to accelerate, decelerate, or change direction depending on the force's magnitude, direction, and combination with other forces acting on the object. Forces underlie all interactions between matter.
Newton's First Law of Motion: Objects in motion stay in motion and objects at rest stay at rest, unless acted upon by an unbalanced force.
Newton's Second Law of Motion: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
Newton's Third Law of Motion: For every action, there is an equal and opposite reaction.
Did you know?
Balanced forces are when two forces of equal size and opposite direction are acting on an object, so the object does not move or change direction. Unbalanced forces are when two forces of different sizes or in different directions are acting on an object, so the object will move or change direction.
Brain break: Draw a BZZZ-zzzy bee flying in a zigzag pattern through a field of colorful flowers
Which type of force keeps an object at rest or in uniform motion?
- Balanced force
- Unbalanced force
Balanced force keeps an object at rest or in uniform motion. An object that is at rest will remain at rest, and an object in motion will continue in uniform motion at constant speed and in a straight line, as long as the net force acting on it is zero. This is known as Newton's First Law of Motion.
Draw/write how a balanced force is different from an unbalanced force.