Answer:
The acceleration would be a=1 m/s^2. Let's explain why.
Explanation:
Let's say the block is □
20N→□ Block is pushed with a constant horizontal force of 20N
□←10N It is known that frictional force is the <u>opposite way</u> of the movement
So it is safe to say that there is 10 N force trying to stop the block.
In this case our net force is
According to <u>Newton's second motion law</u>
(m=mass, F=force, a=acceleration
→
As an extra information the block also applies gravitational m.g force down but since there is no other force applies in the vertical way, ground compansate the force.