Consider the three cases shown in the drawing in which the same force Fis applied to a box of mass M. In which case(s) will the magnitude of the normal force on the box be equal to (Fsine + Mg)?

Two boxes (Box A = 9.7 kg and Box B = 5.4 kg) are connected by acord running over a pulley. The coefficient of kinetic friction betweenbox A and the table is 0.18. We ignore the mass of the cord and pulleyand any friction in the pulley, which means we can assume that a forceapplied to one end of the cord will have the same magnitude at theother end. We wish to find the tension of the cord while accelerating (inN), assuming the cord doesn’t stretch. As box B moves down, box Amoves to the right. Hint: Solve for the acceleration of the system first.

A box of mass 5 kg is at rest on a rough plane inclined at an angle of 40° to the horizontal. Calculate the magnitude of the friction force, in newtons, to two significant figures. (Take the magnitude of the acceleration due to gravity, g. to be 9.8 ms 2.) The magnitude of the friction force is N (to 2.s.f.).

A set of eight boxes, 5.0 kg each, are stacked on top of a table, as shown in the figure below. (a) Draw a FBD of the top-most box and find the normal force exerted on it by the box below. (b) Draw a FBD of the 2nd box from the top, including all three (!) forces acting on it. Find the normal force acting on this box by the box below it. (c) Do you see a pattern now? Draw a FBD of the lowest box, including all three forces acting on it. What is the normal force that the table exerts on this box?

An object of mass m has these three forces acting on it (there is no normal force, "no surface"). F1 = 1 N, F2 = 10 N, and F3 = 4 N. When answering the questions below, assume the x-direction is to the right, and the y-direction is straight upwards. What is the magnitude of the net force, in newtons?  What is the angle θ, in degrees, of the net force, measured from the +x-axis? Enter an angle between -180° and 180°.  What is the magnitude, |a| of the acceleration, in meters per square second, if the block has a mass of 8.9 kg?

I need help with this hw question.