Figure P7.4445. Review. Two constant forces act on an object of mass m =QIC 5.00 kg moving in the xy plane as shown in Figure P7.45.Force F, is 25.0 N at 35.0°, and force F, is 42.0 N at 150°.At time t = 0, the object is at the origin and has velocity(4.00î + 2.50j) m/s. (a) Express the two forces in unit-vectornotation. Use unit-vector notation for your other answers.(b) Find the total force exerted on the object. (c) Find theobject's acceleration. Now, considering the instant t = 3.00 s,find (d)velocity, (e) its position,its kinetic energythe object's(f)from mv, and (g) itsF2Fkineticfrom150°energymu + EF · A. (h) Whatconclusion can you drawby comparing the answersto parts (f) and (g)?35.0°mFigure P7.45

Given:- The mass of the object m = 5.0 kg The force F1 = 25 N at 35o The force F2 = 42.0 N at 150o…

5.00 kg moving in the xy plane as shown in Figure P7. Force F, is 25.0 N at 35.0°, and force F, is 42.0 N at 15 At time t = 0, the object is at the origin and has veloc (4.00î + 2.50j) m/s. (a) Express the two forces in unit-vect notation. Use unit-vector notation for your other answe (b) Find the total force exerted on the object. (c) Find t object's acceleration. Now, considering the instant t = 3.00 find (d) the obiect's

5.00 kg moving in the xy plane as shown in Figure P7. Force F, is 25.0 N at 35.0°, and force F, is 42.0 N at 15 At time t = 0, the object is at the origin and has veloc (4.00î + 2.50j) m/s. (a) Express the two forces in unit-vect notation. Use unit-vector notation for your other answe (b) Find the total force exerted on the object. (c) Find t object's acceleration. Now, considering the instant t = 3.00 find (d) the obiect's

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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45. Review. Two constant forces act on an object of mass m = QC 5.00 kg moving in the xy plane as shown in Figure P7.45. Force F, is 25.0 N at 35.0°, and force F, is 42.0 N at 150°. At time t = 0, the object is at the origin and has velocity (4.00i2.50j m/s. (a) Express the two forces in unit-vector other answers notation. Use unit-vector notation for your (b) Find the total force exerted on the object. (c) Find the object's acceleration. Now, considering the instant t = 3.00 s find (d) velocity, (e) its position (f) its kinetic energy from m and (g) its the object's kinetic from 1500 energy m .T. (h) What conclusion can you 35.00 draw x m by comparing the answers to parts (f) and (g)? Figure P7.45
45. Review. Two constant forces act on an object of mass m = QiC 5.00 kg moving in the xy plane as shown in Figure P7.45. Force F, is 25.0N at 35.0°, and force F, is 42.0 N at 150°. At time t = 0, the object is at the origin and has velocity (4.00i + 2.50j) m/s. (a) Express the two forces in unit-vector notation. Use unit-vector notation for your other answers. (b) Find the total force exerted on the object. (c) Find the object's acceleration. Now, considering the instant t= 3.00 s, find (d) the object's velocity, (e) its position, (f) its kinetic energy from m, and (g) its F, kinetic energy from 150 Imi + EF - AT. (h) What conclusion can you draw by comparing the answers to parts (f) and (g)? 35.0° Figure P7.45
Review. Two constant forces act on an object of mass m = 5.00 kg moving in the xy plane as shown in Figure P7.45. Force F, is 25.0 N at 35.0°, and force F, is 42.0 N at 150°. At time t = 0, the object is at the origin and has velocity (4.00î + 2.50j) m/s. (a) Express the two forces in unit-vector notation. Use unit-vector notation for your other answers. (b) Find the total force exerted on the object. (c) Find the object's acceleration. Now, considering the instant t = 3.00 s, find (d) velocity, (e) its position, (f) its from mv, and (g) its the object's kinetic energy F kinetic from 150° energy Jm Σ . Δr. (h) What conclusion can you draw by comparing the answers to parts (f) and (g)? 35.0° m Figure P7.45
An object with a mass of 1.53 kg is initially at rest upon a horizontal, frictionless surface. An applied force of 4.94 N i acts on the object for 2.2 s. What is the object's final speed?
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When a car is hit from behind, its passengers undergo sudden forward acceleration, which can cause a severe neck injury known as whiplash. During normal acceleration, the neck muscles play a large role in accelerating the head so that the bones are not injured. But during a very sudden acceleration, the muscles do not react immediately because they are flexible; most of the accelerating force is provided by the neck bones. Experiments have shown that these bones will fracture if they absorb more than 8.0 J of energy. (a) If a car waiting at a stoplight is rear-ended in a collision that lasts for 10.0 ms, what is the greatest speed this car and its driver can reach without breaking neck bones if the driver’s head has a mass of 5.0 kg (which is about right for a 70 kg person)? Express your answer in m/s and in mi/h. (b) What is the acceleration of the passengers during the collision in part (a), and how large a force is acting to accelerate their heads? Express the acceleration in m/s2…