4.2.A—Describe the impulse delivered to an object or system

Describe the impulse delivered to an object or system.

• The rate of change of momentum is equal to the net external force exerted on an object or system. Relevant equation:
• Impulse is defined as the product of the average force exerted on a system and the time interval during which that force is exerted on the system. Relevant equation:
• Impulse is a vector quantity and has the same direction as the net force exerted on the system.
• The impulse delivered to a system by a net external force is equal to the area under the curve of a graph of the net external force exerted on the system as a function of time.
• The net external force exerted on a system is equal to the slope of a graph of the momentum of the system as a function of time.