Final answer:
The force needed to make the 1kg mass accelerate at 19m/s/s to the right is 19N.
Step-by-step explanation:
To make a 1kg mass accelerate at 19m/s/s to the right, we need to apply a force. According to Newton's second law of motion, the force can be calculated by multiplying the mass and the acceleration.
F = m * a = 1kg * 19m/s/s = 19N
Therefore, the force needed to be added to the right is 19N.