# data[].attributes.body
A force is a push or pull that can act on an object. A force can be measured by its strength and direction. A force's strength is measured in newtons.

# data[].attributes.body
Force diagrams are used to show how a force is acting upon an object. These diagrams use arrows to show the strength of the forces, and when an object is in motion there is also a speed arrow (showing the direction and speed at which the object is moving).

# data[].attributes.body
If a balanced combination of forces act on an object at rest, it will stay at rest. If a balanced combination of forces act on an object in motion, it will stay in motion at a constant speed and on a straight path.

# data[].attributes.body
If an unbalanced combination of forces acts upon an object, the object's speed and/or direction will change. The forces are unbalanced when only one force acts upon an object.

# data[].attributes.body
Net force can be calculated by adding and/or subtracting the strengths of the forces acting upon an object. If a 200N force and a 100N force were acting upon an object in opposite directions, the net force would be 100N.

# data[].attributes.body
If a net force greater than 0 acts on an object, than the object will begin moving in the direction of the net force.

# data[].attributes.headline
Net Force in Direction of Motion (Forward Forces)

# data[].attributes.subject
Net Force in Direction of Motion (Forward Forces)

# data[].attributes.body
If a net force greater than 0 acts on an object in the same direction as its motion, the object's speed will increase.

# data[].attributes.headline
Net Force in Direction Opposite to Motion (Backwards Forces)

# data[].attributes.subject
Net Force in Direction Opposite to Motion (Backwards Forces)

# data[].attributes.body
If a net force greater than 0 acts on an object in motion in the opposite direction of its motion, the object's speed will decrease. If the net force is constant in the opposite direction, the object may eventually stop and/or reverse its direction.

# data[].attributes.body
Friction can be defined as a backwards force. Friction always hinders the motion of an object, this is due to interaction between the object and the surface it is traveling on, which often contains small bumps and ridges.

# data[].attributes.body
The rate of change in speed is determined by an object's mass and the strength of the non-zero net force acting upon it. The greater the non-zero net force, the greater the rate of change in speed. The greater the object's mass, the lower the rate of change of speed.

# data[].attributes.body
If a force that is not directly in line or directly opposite to the line of motion an object is traveling, the object will change direction.

# data[].attributes.body
When an object is in motion, air always creates a force opposite the object's direction of motion. The greater the surface area of the object, the greater the strength of the air resistance. The greater the speed of the object, the greater the force of the air resistance.

# data[].attributes.body
An object is said to accelerate when it's speed either increases or decreases.