Read the following statement:"The magnitude of the normal force that a body experiences when in contact with a surface is equal tothe magnitude of the normal force that the body exerts on the surface, in the case of an object restingon a horizontal surface (such as the vase shown in the figure), if there is no acceleration on the verticalaxis the magnitude of the normal force is equal to the magnitude of the force generated by the weight,but this normal force is not the reaction force of the weight, the fact that they have the same magnitudeis something circumstantial ".From the above, it can be stated that:a) It's true, because the force of gravitation between bodies is actually related to weight.b) It is true, but the fact that it is something circumstantial is not true, the magnitude of the normalforce is always equal to the magnitude of the weight, regardless of the circumstances.c) It is false, being equal in magnitude, but opposite in direction, it is by definition a reaction force.d) It is false, because it assumes forces not described in a free-body diagram.

Normal force is a force exerted on the body by the surface in the perpendicular direction of the…

Answered: Read the following statement: "The…

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter5: More Applications Of Newton’s Laws

Section: Chapter Questions

Problem 6P: The person in Figure P5.6 weighs 170 lb. As seen from the front, each light crutch makes an angle of...

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Jamal and Dayo are lifting a large chest, weighing 207 lb, by using the two rope handles attached to either side. As they lift and hold it up so that it is motionless, each handle makes a different angle with respect to the vertical side of the chest (Fig. P5.76). If the angle between Jamals handle and the vertical side is 25.0 and the angle between Dayos handle and the vertical side of the chest is 30.0, what are the tensions in each handle? FIGURE P5.76
In a television commercial, a small, spherical bead of mass 4.00 g is released from rest at t=0in a bottle of liquid shampoo. The terminal speed is observed to be 2.00 cm/s. Find (a) the value of the constant bin the equation v=mgb(1ebt/m), and (b) the value of the resistive force when the bead reaches terminal speed.
The person in Figure P5.6 weighs 170 lb. As seen from the front, each light crutch makes an angle of 22.0 with the vertical. Half of the persons weight is supported by the crutches. The other half is supported by the vertical forces of the ground on the persons feet. Assuming that the person is moving with constant velocity and the force exerted by the ground on the crutches acts along the crutches, determine (a) the smallest possible coefficient of friction between crutches and ground and (b) the magnitude of the compression force in each crutch. Figure P5.6
You are playing with your daughter in the snow. She sits on a sled and asks you to slide her across a flat, horizontal field. You have a choice of (a) pushing her from behind, by applying a force downward on her shoulders at 30 below the horizontal (Fig. 5.2a) or (b) attaching a rope to the front of the sled and pulling with a force at 30 above the horizontal (Fig 5.2b). Which would be easier for you and why?
Two forces are applied to a 5.0-kg object, and it accelerates at a rate of 2.0m/s2 in the positive y -direction. If one of the forces acts in the positive x -direction with magnitude 12.0 N, find the magnitude of the other force.
Calculate the tension in a vertical strand of spider webif a spider of mass 8.00×10−5 kg hangs motionless on it.(b) Calculate the tension in a horizontal strand of spider web ifthe same spider sits motionless in the middle of it much likethe tightrope walker . The strand sags at anangle of 12º below the horizontal. Compare this with thetension in the vertical strand (find their ratio).
The person in Figure P4.49 weighs 170. lb. Eachcrutch makes an angle of 22.0° with the vertical (as seen from thefront). Half of the person’s weight is supported by the crutches,the other half by the vertical forces exerted by the ground on his feet. Assuming he is atrest and the force exerted bythe ground on the crutchesacts along the crutches, determine(a) the smallest possiblecoefficient of friction betweencrutches and ground and(b) the magnitude of the compressionforce supported byeach crutch.
It is intended to remove a stake from the ground by means of two ropes, as shown in the figure. Knowing the magnitude and direction of the force exerted on one string, determine the magnitude and direction of the force P that must be exerted on the other string if the resultant of the two forces is to be a 40-lb vertical force.
A persons head is bent over a book. The head weighs P=37.2 N and is supported by the muscle force Fm exerted by the neck extensor muscles and by the contact force Fc excerted at the atlantooccipital joint. Given that the magnitude of Fm is 60.0 N and is directed 35.0 degree below the horizontal. Find the direction of the contact force Fc. If the direction is below the horizontal, enter a negative value.
A man drags a package across the floor with a force of 40 N, as shown. The mass of the package is 10 kg. If the acceleration of the package across the floor is 3.5 m/s^2, and friction can be neglected, at what angle to the horizontal does the man pull?
True or false? If two external forces that are both equal in magnitude and opposite in direction act on the same object, the two forces can never be a Newton’s third-law pair. True or false? In considering forces in systems, their direction is not important.
A mass of 62 kg is suspended from a ceiling by two lengths of rope that make angles of 52deg and 74deg with the ceiling. Determine the tension, correct to one decimal place, in each of the ropes.

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