Please help A man is pushing a box of weight W with a forward force of magnitude F. The box moves forward with a constant speed. What is the magnitude f of the friction force?
A. F
B. F × W
C. F/W
D. W

A box of weight 320 N is being pulled to the right by a pulling force of magnitude 44 N. Consider the system to be in a state of equilibrium. To make an accurate free-body diagram of the box, the letter f in the diagram above should be replaced with the label .

A.44 N
B.48 N
C.4.0 N
D.280 N
which force is represented by L? (L is the arrow pointing up above the airplane)
A. the force caused by the wings encountering wind and air
B. the force that exists in reaction to gravity or weight
C. the force caused by a draft of wind
D. the reaction force of wind and air that is pushed out of the way
Which object is in equilibrium?
A. a satellite orbiting Earth at constant speed at a constant altitude
B. a train traveling at constant speed along a straight track
C. a branch falling from the top of a tall tree
D. a top that is spinning on a flat surface