From Newton's Second Law of motion, force (F) is the product of mass (m) of the object and the acceleration (a).
F = m x a
Substituting the known values above,
1000 N = (0.045 kg) x a
a = 22222.22 m/s²
Velocity, on the other hand, is the product of acceleration and time.
v = a x t
Substituting the known values,
v = (22222.22 m/s²)(1.8 x 10^-3 s)
v = 40 m/s
Thus, the velocity or speed of the golf ball is 40 m/s.