# data[].attributes.body
an object in motion has balanced forces it will continue to move in a straight line at a constant speed. otherwise, balanced forces means that an object is at rest

# data[].attributes.headline
Newton's Second Law - rate of change in speed

# data[].attributes.subject
Newton's Second Law - rate of change in speed

# data[].attributes.body
if an unbalanced combination of forces acts on an object, its speed and/or direction will change. The rate of change of speed is then calculated by using (strength of net force/mass of object). stronger force means a higher rate of change. more mass means a lower rate of change.

# data[].attributes.body
in a push/pull interaction, the two objects exert a force on each other. The forces are equal and opposite in direction.

# data[].attributes.body
force is acting only while interacting with the object. when there is a force, there is a strength of force and a direction. The arrows going outward from the box are the force arrows that indicate strength and direction. Also, there will be a speed arrow above the object that indicates the direction of movement and speed of the object.

# data[].attributes.body
if there are multiple forces on an object, the object's motion results from the combined forces.

# data[].attributes.headline
Calculating net forces: unbalanced forces

# data[].attributes.subject
Calculating net forces: unbalanced forces

# data[].attributes.body
Unbalanced forces means that the forces going in opposite direction have an unequal amount of force.

# data[].attributes.body
if forces going in opposite directions have equal amounts of force, then they are balanced.

# data[].attributes.body
if an object is at rest and a net force greater than zero acts on it, then the object will begin to move in the direction of the net force.

# data[].attributes.body
while an object is already in motion and a force acts on the object in the same direction, then the object's speed will increase. These forces are also noted as forward forces.

# data[].attributes.headline
net force opposite to direction of motion

# data[].attributes.subject
net force opposite to direction of motion

# data[].attributes.body
If an object is in motion and a force acts on it going the opposite direction then the object's speed will decrease. These forces are also noted as backwards forces. If the backwards force continues long enough, it can stop the object and even reverse its motion. Example: a backwards fan can slow the object and change its direction.

# data[].attributes.body
greater strength of force = greater rate of change of speed

greater mass of object = lower rate of change of speed (inertia)

rate of change of speed = strength of net force / mass of object

# data[].attributes.body
an object in motion while in the air will have air resistance exerted on it in the opposite direction of motion. The strength of the drag is influenced by speed of the object and the surface area of the object.

faster speed = more drag force

greater surface area = greater drag force