Consider these two cases for the following two questions: (1) a book sits at rest on a table, touching only the table, and (2) a string pulls up on a book which is at rest on a table.   1. The magnitude of the normal force of the table on the book in (1) is _______ the magnitude of the normal force of the table on the book in (2). 2. The direction of the normal force of the table on the book in (1) is in the _______  direction as the normal force of the table on the book in (2).

Imagine a book sitting on a horizontal table. One of the forces acting on a book is a normal force exerted by the table (let's call it action). What force does form the Newton's 3rd law pair (reaction)? Normal force exerted on the Earth by the book. Normal force exerted on the table by the book. Normal force exerted on the table by the Earth. Normal force exerted on the Earth by the table.

You are riding an elevator. The elevator has a built-in scale so that you can measure your weight while it is moving. (1) draw a free-body diagram that shows all the forces acting on you while the elevator is moving. You can take your body as a point and use arrows for the forces acting on the point. (2) Derive equation that shows the reading of your weight during the period when the elevator is speeding up and moving upward. (3) Derive equation that shows the reading of your weight during the period when the elevator is speeding up but moving downward. Show your work that leads to your answer. Write down your definitions of all the variables. Explain each step in your work to

A book of mass m is pushed against a smooth frictionless wall by a force P that makes an angle 0 the horizontal. Find: a) The normal force on the book. b) The acceleration of the block in terms of P, m, 0, and constants. c) Look at the special values of the angle to see if the above answers make sense

A box-shaped of mass 5.2 kg is hung against a building, resting against the wall and suspended on a rope oriented at theta=37 degrees.  a) find the magnitude of the normal force acting on the box b) determine the tension in the rope c) What is the magnitude of force on the wall exerted by the box?

Hi, I need help with part d of this question. Thanks.

A 16.2 kg box (labelled m1) rests on a table. Weight of box is 160N, and the normal force acting on it from the table is 160N. A second box m2, of mass 1.93 kg, is placed on top of the 16.2 kg box. 1. Determine the normal force (in newtons) that the table now exerts on the 16.2 kg box. 2. Determine the normal force (in newtons) that the 16.2 kg box exerts on the 1.93 kg box.

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?

3) A bar with length `, and mass m is held horizontally by two massless cords as in Figure 1. The bar has non-uniform density, so its center of mass xcm is not necessarily at the center of the bar. The left cord attaches to the wall with angle θ, the right with angle φ. Express all answers in terms of m, g, φ, and θ (or subsets thereof). (i) Draw a diagram with all forces on the bar at their respective locations. (ii) What is the tension in the left cord? Give your answer in terms of m, g, θ, and φ. (iii) What is the tension in the right cord? Give your answer in terms of m, g, θ, and φ. (iv) What is the location of the bar’s center of mass xcm relative to the left most point of the bar (as indicated in Figure 1).

A block of mass M is pulled along a horizontal, flat, and smooth (no friction) surface by a rope of mass m, on which a force ?⃗is acting. If we consider that the rope does not stretch out when it is pulled, then the block and rope will move under the same acceleration. Determine the value of such acceleration. Now, if the mass of the rope m is much smaller than the mass of the block M, then what is the approximate value of the acceleration?