Física I 8L ITESM CEMTaller Final 

Question 3.4 The x- and y-coordinates of a particle in motion, as functions of time t, are given by:

. The smallest magnitude of the acceleration is closest to ANSWER: _____________________Question 3.8 Figure 3.2, A projectile is fired from the origin (at y = 0 m) as shown in the figure. The initial velocity

components are and . The projectile reaches maximum height at point P, then it falls and strikes the ground at point Q. the y-coordinate of point P is closest to: ANSWER: _____________________

Figure 3.2

Question 3.9 Figure 3.2, A projectile is fired from the origin (at y = 0 m) as shown in the figure. The initial velocity

components are and . The projectile reaches maximum height at point P, the x-component of

the velocity of the shell at point P is closest to: ANSWER: _____________________Question 3.10 Figure 3.2 A projectile is fired from the origin (at y = 0 m) as shown in the figure. The initial velocity

components are and . The projectile reaches maximum height at point P, then it falls and

strikes the ground at point Q. In Fig. 3.2, the y-component of the velocity of the shell of point P is closest to:ANSWER: _____________________

Question 3.11 Figure 3.2 A projectile is fired from the origin (at y = 0 m) as shown in the figure. The initial velocity

components are and . The projectile reaches maximum height at point P, then it falls and strikes the ground at point Q. In Fig. 3.2, the y-component of the acceleration of the shell at point P is closest to:

ANSWER: _____________________Question 3.58 In U.S. football, after a touchdown the team has the opportunity to earn one more point by kicking the ball over the bar between the goal posts. The bar is 10.0 ft above the ground, and the ball is kicked from ground level, 36.0 ft horizontally from the bar (the figure ). Football regulations are stated in English units, but convert to SI units for this problem.There is a minimum angle above the ground such that if the ball is launched below this angle, it can never clear the bar, no matter how fast it is kicked. What is this angle? ANSWER: _____________________

 Question 1.11 Figure 1.1 Vectors and are shown. Vector is given by . The magnitude of vector is

16.0 units, and the magnitude of vector is 7.00 units. ANSWER: _____________________

Figure 1.1Question 5.21 Figure 5.9, Blocks A and B of masses 19 kg and 15 kg, respectively, are connected by a rope, which passes over a light frictionless pulley, as shown. The horizontal surface is rough. The coefficients of static and kinetic friction are 0.40 and

0.20, respectively. External forces P and Q act on block B, as shown. In Fig. 5.9, force P equals 60 N. The maximum value of force Q, for which the system remains at rest is closest to: ANSWER: _____________________

Figure 5.9

Question 5.38 In Fig. 5.13, two wooden blocks of 0.30 kg mass each are connected by a string that passes over a pulley. One block slides on a horizontal table, while the other hangs suspended by the string, as shown in the sketch. At t = 0, the suspended block is 0.80 m over the floor, and the blocks are released from rest. After 2.5 s, the suspended block reaches the floor. What is the coefficient of kinetic friction between the table and the sliding block? ANSWER: _____________________

Figure 5.13Question 13.1A 4.8-kg block attached to a spring executes simple harmonic motion on a frictionless horizontal surface. At time t = 0 s, the block has a displacement of -0.50 m, a velocity of -0.80 m/s, and an acceleration of +8.3 m/s2. The force constant of the spring is closest to: ANSWER: _____________________Question 13.22 A mass at the end of an ideal spring vibrates with period T. If you double the mass, by what factor must you change the force constant of the spring so that the period of vibration will now be 2T? ANSWER: _____________________Question 16.2 A 380-Hz tone has an intensity level of 64 dB. The velocity of sound in air is 345 m/s. The bulk modulus of air is 142 kPa. The displacement amplitude of the sound waves, in SI units, is closest to: ANSWER: _____________________Question 16.51 The speed of sound in an alcohol, at a temperature of 20 °C, is 1240 m/s. The density of the alcohol at that temperature is 830 kg/m3. The bulk modulus of the alcohol, at a temperature of 20 °C, in MPa, is closest to:

ANSWER: _____________________Question 16.55 A metal bar 14.0 m long has a density of 5800 kg/m3 and a diameter of 6 cm. Longitudinal sound waves take 3.00 x 10-3 s to travel the length of the bar. What is Young's modulus for this material? ANSWER: _____________________Question 16.50 The speed of sound in steel is 5000 m/s. What is the wavelength of a sound wave of frequency 270 Hz in steel?

ANSWER: _____________________       

HOJA DE RESPUESTA.Nombre del Estudiante:Matrícula:Fecha de envío:Hora de envío:

PREGUNTA RESPUESTAQuestion 3.4

Question 3.8

Question 3.9

Question 3.10

Question 3.11

Question 3.58

Question 1.11

Question 5.21

Question 5.38

Question 13.1

Question 13.22

Question 16.2

Question 16.51

Question 16.55

Question 16.50