It could be anything between 5 N and 13 N, depending on
the direction of the 9 N component.
The forces are in opposite directions, so subtract. 9n - 5n = 4n. Direction is North.
13N + 4N = 17N
If you have those two forces, the net force can be anything between 8 - 4 and 8 + 4 newton, depending on the angle between the force vectors.
The acceleration will be 4 metres per second-squared in the direction of the net force.
4 Newtons to the right
= .----> -16 + 20 =+4
4 N upward
10 N you idiot
There is no net force OF the object. If the forces act in the same direction, the net force is magnitude of the net force is the sum of the forces and acts in the same direction. If the forces act in opposite directions, the magnitude of the net force will be the difference between their magnitudes and it will act in the direction of the larger of the two forces.
4 N upward
The object experiences 20 newtons pulling it down due to gravity. But it also experiences 4 newtons air resistance pushing it up. 20 - 4= 16 newtons net downward force on the object.
F = m aa = F/mThe acceleration of (2F) acting on (4m) is ( 2F/4m ) = (2/4) (F/m) = (2/4) a = 1/2 a
force = mass x acceleration so if force doubles acceleration doubles to 8 m/s2