That "force" is what scientists and dieticians call the "weight" of the ball.
Weight = (mass) x (acceleration of gravity)
On or near the Earth's surface, the acceleration of gravity is 9.8 m/s² .
Weight of the ball = (7 kg) x (9.8 m/s²)
Weight of the ball = 68.6 kg-m/s²
The unit " kg-m/s² " is called "Newton".
Weight of the ball = 68.6 Newtons
(that's about 15.4 pounds)
= = = = = = = = = =
Note: We don't usually talk about it, but the counter is also pushing UP on the ball, with exactly the same amount of force.