Answer:
a = 4.125 [m/s^2]
Step-by-step explanation:
In order to calculate the value of acceleration, we must use Newton's second law, which tells us that the sum of forces must be equal to the product of mass by acceleration.
ΣF = m*a
where:
ΣF = sum of forces [N]
m = mass [kg]
a = acceleration [m/s^2]
Performing a summation of forces on the x-axis, we have:
4000 - 700 = m*a
4000 - 700 = 800*a
a = 4.125 [m/s^2]