Answer:
The acceleration of the object is 5 m/
 .
. 
Step-by-step explanation:
From the Newton's second law we can add an equation as:
 F= ma.........................................1
 where, f= force
 m= mass of object 
 a= acceleration of object
We are given net force as 7500 N, mass as 1500 kg so insert the value in equation 1, we get
 7500 N = 1500 × a
 or, a= 

  or, a= 5 m/

Hence the acceleration of the truck is 5 meter per second square.