Answer:
a=

Step-by-step explanation:
The net force,
of the box is expressed as a product of acceleration and mass hence
where m is mass and a is acceleration
Making a the subject, a=

From the attached sketch,
∑
where
is frictional force and
is horizontal angle
Substituting ∑
as
in the equation where we made a the subject
a=

Since we’re given the value of F as 240N,
as 41.5N,
as
and mass m as 30kg
a=
