Forces

Forces
I was looking at the 5th Grade Expectations, provided by the State of Michigan. Here is what they say students should learn about forces:

P.FM.M.2 Force Interactions- Some forces between objects act when the objects are in direct contact (touching), such as friction and air resistance, or when they are not in direct contact (not touching), such as magnetic force, electrical force, and gravitational force. P.FM.05.21 Distinguish between contact forces and non-contact forces. P.FM.05.22 Demonstrate contact and non-contact forces to change the motion of an object.

P.FM.M.3 Force- Forces have a magnitude and direction. Forces can be added. The net force on an object is the sum of all of the forces acting on the object. The speed and/or direction of motion of an object changes when a non-zero net force is applied to it. A balanced force on an object does not change the motion of the object (the object either remains at rest or continues to move at a constant speed in a straight line). P.FM.05.31 Describe what happens when two forces act on an object in the same or opposing directions. P.FM.05.32 Describe how constant motion is the result of balanced (zero net) forces. P.FM.05.33 Describe how changes in the motion of objects are caused by a non-zero net (unbalanced) force. P.FM.05.34 Relate the size of change in motion to the strength of unbalanced forces and the mass of the object.

David Bydlowski Wayne County Math and Science Center at Wayne RESA