Answer:
The mass of the ball is 1.64 kg.
Explanation:
You have to apply Newton's second law, F = m×a where F represents force, m is mass and a is acceleration :
[tex]F = m \times a[/tex]
[tex]let \: F = 12.6,a = 7.7[/tex]
[tex]12.6 = m \times 7.7[/tex]
[tex]12.6 \div 7.7 = m[/tex]
[tex]m = 1.64kg \: (3sf)[/tex]
