Brick moves across a rough surface at constant velocity. which of the following are forces that should be included in a free body diagram? (select all that apply)
force of motion
gravity
friction
applied force

Aclarinetist, setting out for a performance, grabs his 3.350 kg clarinet case (including the clarinet) from the top of the piano and carries it through the air with an upward force of 24.65 n. find the case's vertical acceleration. indicate an upward acceleration as positive and a downward one as negative.