Answer: 350 N
Step-by-step explanation:
Given
Mass of ball is

Speed of ball after rebound is

Time period for impulse

Impulse imparted in equal to the change in the momentum of object
![\Rightarrow J=m(v-u)\quad [\text{u=speed of ball before collision}]\\\Rightarrow J=0.5* \left(2-(-5)\right)\\\Rightarrow J=0.5* 7\\\Rightarrow J=3.5\ N.s](https://img.qammunity.org/2022/formulas/physics/high-school/8i84sdyjgbjo13wv5baxt3jgvbalcaj9pa.png)
Impulse is the product of average force and duration of application
