What is a free-body diagram .A It's a sketch of a moving body that shows internal forces of the body and reaction forces .B It's a sketch of an undisturbed body that shows external forces of the body .C It's a sketch of an isolated body that shows external forces of the body and reaction forces .D It's a sketch of a body in motion that shows bending forces of the body

What is a free-body diagram .A It's a sketch of a moving body that shows internal forces of the body and reaction forces .B It's a sketch of an undisturbed body that shows external forces of the body .C It's a sketch of an isolated body that shows external forces of the body and reaction forces .D It's a sketch of a body in motion that shows bending forces of the body

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter5: The Laws Of Motion

Section: Chapter Questions

Problem 5.53P: Review. A rifle bullet with a mass of 12.0 g traveling toward the right at 260 m/s strikes a large...

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Measuring coefficients of friction A coin is placed near one edge of a book lying on a table, and that edge of the book is lifted until the coin just slips down the incline as shown in Figure P4.82. The angle of the incline, C, called the critical angle, is measured. (a) Draw a free-body diagram for the coin when it is on the verge of slipping and identify all forces acting on it. Your free-body diagram should include a force of static friction acting up the incline. (b) Is the magnitude of the friction force equal to sn for angles less than C? Explain. What can you definitely say about the magnitude of the friction force for any angle c? (c) Show that the coefficient of static friction is given by s = tan c. (d) Once the coin starts to slide down the incline, the angle can be adjusted to a new value c c such that the coin moves down the incline with constant speed. How does observation enable you to obtain the coefficient of kinetic friction? Figure P4.82
The leg and cast in Figure P4.40 weigh 220 N (w1). Determine the weight w2 and the angle needed so that no force is exerted on the hip joint by the leg plus the cast. Figure P4.40
A body of mass 100 kg is weighed at the North Pole and at the equator with a spring scale. What is the scale reading at these two points? Assume that g=9.83m/s2 at the pole.
Review. A rifle bullet with a mass of 12.0 g traveling toward the right at 260 m/s strikes a large hag of sand and penetrates it to a depth of 23.0 cm. Determine the magnitude and direction of the friction force (assumed constant) that acts on the bullet.
A small steel I-beam (Fig. P6.14) is at rest with respect to the steel surface of a truck. The truck is accelerating with respect to the road. The mass of the I-beam is 5.8 103 kg. a. Draw a free-body diagram for the I-beam. b. What force or forces accelerate the I-beam with respect to the ground? c. The I-beam must remain at rest with respect to the truck. What is the maximum acceleration of the truck? Evaluate your answer. d. On the highway, the truck moves with a constant velocity. Draw a free-body diagram for the I-beam. Compare it with your diagram in part (a). FIGURE P6.14
Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts a force of 75.0 N, the second a force of 90.0 N, friction is 12.0 N, and the mass of the third child plus wagon is 23.0 kg. (a) What is the system of interest if the acceleration of the child in the wagon is to be calculated? (b) Draw a free-body diagram, including all forces acting on the system. (c) Calculate the acceleration. (d) What would the acceleration be if friction were 15.0 N?
14. What is a free-body diagram? a. It’s a sketch of a moving body that shows internal forces of the body and reaction forces b. It’s a sketch of an undisturbed body that shows external forces of the body c. It’s a sketch of an isolated body that shows external forces of the body and reaction forces d. It’s a sketch of a body in motion that shows bending forces of the body 15. The main condition for the rigid body is that the distance between various particles of the body does change. a. True b. False
A 0.300-kg mass hangs at the end of a rope. A second rope hangs from the bottom of that mass and supports a 0.900-kg mass. Questions: a. Find the tension in each rope when the masses are accelerating upward at 0.7 m/s². Take note of gravity also. b. Find the tension in each string when the acceleration is 0.700 m/s² going down.
A box is pulled at a constant speed, v, along a horizontal surface with a kinetic coefficient of friction less than 1. The person pulls with a constant horizontal force, F, on the box. The constant horizontal force the person pulls with: A. Has the same size as the weight of the box. B. Is greater than the weight of the box. C. Is less than the weight of the box. D. Is greater than the friction force.
2- N.F. is the strongest force in the body. true O false
1. the wheel barrow at rest containing stones has a force of 1000 N.A man exerted a push of 500 N.A.will he able to move the wheelbarrow?_______B. suppose another man tried to help him and exerted a force of 500N. will they able to move the wheel barrow?_______C.another man saw their struggle in pushing the wheel barrow. he tried to help them. He exerted a force of 400N. will the three of them move the wheel barrow?_________
1:06 طائرات ب.pdf University of Technology Mechanical Department 2020/2021 Date :4/3/2021 Time :30 minutes Friction Ass.Prof.Dr.Enass H.Flaieh Block A weighting 1000N rests over block B which weights 2000N as shown in the figure. Block A is tied to the wall with horizontal string. If the coefficient of friction between blocks A and B is 0.25 and A between B and the floor is 0.333. What should be the value of the horizontal force P to move the block B.