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 a system’s momentum is equal to the net external force exerted on that system. Relevant equation: F dp dt net =  
• Impulse is defined as the integral of a force exerted on an object or system over a time interval. 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. TOPIC 4.2 Change in Momentum and Impulse