When a parachute opens, the air exerts a large drag force on it. This upward force is initially greater than the weight of the sky diver and, thus, slows him down. Suppose the weight of the sky diver is 965 N and the drag force has a magnitude of 1016 N. The mass of the sky diver is 98.5 kg. Take upward to be the positive direction. What is his acceleration, including sign?

A student decides to move a box of books into her dormitory room by pulling on a rope attached to the box. She pulls with a force of 118.0 N at an angle of 18.0° above the horizontal. The box has a mass of 25.0 kg, and the coefficient of kinetic friction between box and floor is 0.300. (a) Find the acceleration of the box. m/s² up the incline (b) The student now starts moving the box up a 10.0° incline, keeping her 118.0 N force directed at 18.0° above the line of the incline. If the coefficient of friction is unchanged, what is the new acceleration of the box? m/s² up the Incline Need Help? Read It

A clarinetist, setting out for a performance, grabs his 3.210 kg clarinet case (including the clarinet) from the top of the piano and carries it through the air with an upward force of 33.06 N. Find the case's vertical acceleration. Indicate an upward acceleration as positive and a downward one as negative. Use for ?=9.810 m/s2 for the acceleration due to gravity.

A 200 kg steel crate is being pulled up a steel ramp, inclined 25 degrees. The crate is attached to a massless rope, around a frictionless pulley. Hanging over the edge of a cliff, and attached to the other end of the rope, is a 300 kg counterweight. a) Is the 200 kg steel crate moving up the ramp? b) If so, what is its acceleration?

A tourist pulls a loaded suitcase at a constant velocity to the right with a force applied to the handle at an angle 8 above the horizontal. A small force of friction resists the motion. Draw an FBD of the suitcase, labeling the components of the appropriate forces.

A book with mass = 2.25 kg rests on the surface of a bar. The coefficient of static friction between the book and the par us=0.71 and the coefficient of kinetic friction is uk=0.44.   What would the expression be for alpha, the book's acceleration, after it begins moving? Especially assuming the min force Fm continues to be applied. How is this numerically solved for acceleration in terms of a in m/s2

A person of mass M = 60 kg lifts an object of mass m = 10 kg upward with acceleration a. If the magnitude of the normal force that the person feels from the floor the person is standing on is 796 N, what is the acceleration a?  (Neglect the mass of the accelerating arm of the person.)  In answering the problem to get the acceleration a, draw the free-body diagrams for the problem.

Determine the force Q-> when the block moves with constant velocity. Express your answer in vector form.

Two blocks, each of mass 1.61 kg, hang from the ceiling of an elevator which accelerates upward with an acceleration of 1.50 m/s2. Find the tension, T2, in N.

You are standing on a bathroom scale inside an elevator. Your weight is 144 lb, but the reading of the scale is 112 lb. a. What is the acceleration of the elevator? If the acceleration is in upward direction, enter a positive value and if it is in downward direction, enter a negative value. answer in m/s^2 b. see attached