Answer:
F = 1400 N
Step-by-step explanation:
It is given that,
Mass of the ball, m = 70 kg
It is moving with an acceleration of 20 m/s². We need to find the force exerted by the ball.
Force is given by the product of mass and acceleration. So,
F = ma
![F=70\ kg* \ 20m/s^2\\\\F=1400\ N](https://img.qammunity.org/2021/formulas/physics/high-school/8mz9bc8mkm5d8vxa39ncy7z4yrqg5c45fq.png)
So, the force of 1400 N is exerted by a metal ball.