Demi pushes a dresser over a bedroom floor. Its free-body diagram carries four arrows with sizes: the force from Demi, 90 N rightward; friction, 55 N leftward; the weight, 400 N down; the normal force, 400 N up.
All four act at once. What single net force do they amount to?
Work one line at a time: the up-down line first, then the left-right line.
Up against down: 400 N up and 400 N down. Equal sizes, opposite directions: they cancel, and the vertical net is zero.
Left against right: 90 N rightward against 55 N leftward.
Opposite directions subtract, and the leftover keeps the bigger force's direction:
90 − 55 = 35
So the net force on the dresser is 35 N rightward.
A hanging planter's diagram shows a tension of 18 N up and a weight of 11 N down. Enter the size of the net force on the planter in N.
A wagon's diagram shows a 40 N force rightward and 26 N of friction leftward. Which direction is the net force?
A recycling bin is pushed leftward: its diagram shows a 60 N weight down, a 60 N normal force up, 22 N from Clara leftward, and 9 N of friction rightward. Enter the size of the net force in N.
State both parts every time: the size and the direction.
When one line cancels, the net force is simply the other line's leftover.
Find the net force on Demi's dresser: 90 N rightward from Demi, 55 N of friction leftward, a 400 N weight down, and a 400 N normal force up.
Write down the vertical forces:
400 N up, 400 N down
Equal sizes, opposite directions: the vertical net is zero.
Write down the horizontal forces:
90 N rightward, 55 N leftward
Subtract, and keep the bigger force's direction:
90 − 55 = 35
The net force on the dresser is 35 N rightward.
A floor lamp is slid over a very smooth floor: a 30 N weight down, a 30 N normal force up, and an 8 N force from Yusuf rightward. The floor is so smooth that friction is too small to count. Find the net force.
Write down the vertical forces:
30 N up, 30 N down
Equal and opposite: the vertical net is zero.
Write down the horizontal forces:
8 N rightward, and nothing leftward
The net force on the lamp is 8 N rightward.
A loaded cart's diagram shows 250 N down, 250 N up, a 75 N pull rightward, and 31 N of friction leftward. What is the net force on the cart?
A bucket hangs from a rope: its diagram shows 52 N of tension up and a 38 N weight down. Enter the size of the net force on the bucket in N.
A desk's diagram shows 300 N down, 300 N up, 45 N rightward, and 45 N leftward. Enter the size of the net force on the desk in N.