22 Pages

# chap4

Course Number: PHYSICS 8A 69054, Fall 2009

College/University: Berkeley

Word Count: 11445

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CHAPTER 4 MOTION IN MORE THAN ONE DIMENSION Problem 3. An object is moving in the x direction at 1.3 m/s when it is subjected to an acceleration given by a = 0.52 m/s2 . What is its velocity vector after 4.4 s of acceleration? ActivPhysics can help with these problems: All Activities in Section 3, Projectile Motion Section 4-1: Velocity and Acceleration Problem 1. A skater is gliding along the ice at 2.4 m/s,...

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Berkeley - PHYSICS 8A - 69054
CHAPTER 5FORCE AND MOTIONSolutionAssume that the seatbelt holds the passenger rmly to the seat, so that the passenger also stops in 0.14 s without incurring any secondary impact. Then the passengers average acceleration is aav = (0 v0 )/t, and the aver
Berkeley - PHYSICS 8A - 69054
CHAPTER 6USING NEWTONS LAWS2T cos 25 Fres = max , since T1 = T2 = T. (a) If ax = 0, Fres = 2(1100 N) cos 25 = 1.99 kN. 2 (b) If ax = 0.16 m/s , Fres = 1.99 kN (3700 kg) (0.16 m/s2 ) = 1.40 kN.ActivPhysics can help with these problems: All Activities in
Berkeley - PHYSICS 8A - 69054
CHAPTER 7WORK, ENERGY, AND POWERHow much work do you do on the barbell during this time? (c) You lower the barbell to the ground. Now how much work do you do on it?ActivPhysics can help with these problems: Activity 5.1 Section 7-1: Work Problem1. How
Berkeley - PHYSICS 8A - 69054
CHAPTER 8CONSERVATION OF ENERGYSolutionTake the origin at point 1 in Fig. 8-26 with the x-axis horizontal to the right and the y-axis vertical upward. The gravitational force on an object is constant, Fg = mg, while the paths are (a) dr = dy for x = 0
Berkeley - PHYSICS 8A - 69054
CHAPTER 9GRAVITATION radius. Thus, R/RE = 1/ 3 = 57.7% gives the new, shrunken radius.ActivPhysics can help with these problems: Activity 4.8 Section 9-2: The Law of Universal Gravitation Problem1. Space explorers land on a planet with the same mass a
Berkeley - PHYSICS 8A - 69054
CHAPTER 10SYSTEMS OF PARTICLESy 35 MgActivPhysics can help with these problems: Activities 6.6, 6.7 Section 10-1: Center of Mass Problem1. A 28-kg child sits at one end of a 3.5-m-long seesaw. Where should her 65-kg father sit so the center of mass wi
Berkeley - PHYSICS 8A - 69054
CHAPTER 11COLLISIONSan average impulsive force of 1.2105 N acts for 0.25 s? (b) If the car's mass is 1800 kg, for what initial speed would this collision bring the car to a stop?ActivPhysics can help with these problems: Activities 6.26.6 Section 11-1:
Berkeley - PHYSICS 8A - 69054
CHAPTER 12ROTATIONAL MOTIONProblem4. A 25-cm-diameter circular saw blade spins at 3500 rpm. How fast would you have to push a straight hand saw to have the teeth move through the wood at the same rate as the circular saw teeth?ActivPhysics can help wi
Berkeley - PHYSICS 8A - 69054
CHAPTER 13ROTATIONAL VECTORS AND ANGULAR MOMENTUMActivPhysics can help with these problems: Activities 7.1, 7.16, 7.17 Section 13-1: Angular Velocity and Acceleration Vectors Problem1. A car is headed north at 70 km/h. Give the magnitude and direction
Berkeley - PHYSICS 8A - 69054
CHAPTER 14STATIC EQUILIBRIUMProblem2. A body is subject to three forces: F1 = 2^ + 2^ N, i applied at the point x = 2 m, y = 0 m; F2 = -2^ - i 3^ N, applied at x = -1 m, y = 0; and F3 = 1^ N, applied at x = -7 m, y = 1 m. (a) Show explicitly that the n
Berkeley - PHYSICS 8A - 69054
PART 2OSCILLATIONS, WAVES, AND FLUIDS OSCILLATORY MOTIONcos[(10 s1 )t]. (b) The maximum (positive) velocity occurs at t = 0 if sin = 1 (from Equation 15-10), therefore, the motion is described by Equation 15-9 with A = 2.5 cm, = 5 s1 , and = /2. Since c
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N.C. State - MEA - 130
Chapter 3 HW 1.Which of the following is THE major controller of temperature? Student Response Value Differential 0% heating of land and water Ocean currents 0% Geographic 0% position Latitude 100% 0% Correct Answer FeedbackA. B. C. D.E. Cloud cover Sc
N.C. State - MEA - 130
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Michigan State University - CEE - CE 221
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Michigan State University - CEE - CE 221
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Michigan State University - CEE - CE 221
Michigan State University - CEE - CE 221
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Michigan State University - CEE - CE 221
Michigan State University - CEE - CE 221
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Michigan State University - CEE - CE 221
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Michigan State University - CEE - CE 221
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Michigan State University - CEE - CE 221
Michigan State University - CEE - CE 221
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Michigan State University - CEE - CE 221
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Michigan State University - CEE - CE 221
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Michigan State University - CEE - CE 221
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Michigan State University - CEE - CE 221
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Michigan State University - CEE - CE 221
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Michigan State University - CEE - CE 221
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Michigan State University - CEE - CE 221
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Michigan State University - CEE - CE 221
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Michigan State University - CEE - CE 221
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Michigan State University - CEE - CE 221
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Michigan State University - CEE - CE 221
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Michigan State University - CEE - CE 221
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Michigan State University - CEE - CE 221