Final answer:
The impulse that occurs when an average force of 10 N is exerted on a cart for 3.0 s is 30 N.s.
Step-by-step explanation:
The impulse that occurs when an average force of 10 N is exerted on a cart for 3.0 s can be calculated using the formula:
Impulse = Force x time
Using the given values:
Impulse = 10 N x 3.0 s = 30 N.s
Therefore, the impulse that occurs is 30 N.s.