Under the action of the engine a car with a mass of 2 tons, increases its speed for 10 seconds from 18 km / h. up to 72 km / h. Find the F of the car ?

The center is basically the heart of it

Gas will most likely  fill the container 

I'm having some difficulty seeing the diagram clearly.but the question says there's a net inward force on the object.so we know right away,  from newton's 2nd law of motion, thatthat baby is accelerating.  it doesn't even matter which way thenet force is pointing.  if there's any net force, then either theobject's speed or else its direction must be changing.