Figure EX 4.20 shows the angular-position-versus- time graph for a particle movi
ID: 1590974 • Letter: F
Question
Figure EX 4.20 shows the angular-position-versus- time graph for a particle moving in a circle. Write a description of the particle's motion. Draw the angular-velocity -versus-time graph. Figure EX 4.21show the angular-velocity-versus-time graph for a particle moving in a circle. How much revolutions does the object make during the first 4 s? Figure EX 4.22 shows the angular-velocity-versus-time graph for a particle moving in a circle, starting form theta_0 = 0 rad at t = 0 s. Draw the angular-position-versus-time graph. Include an appropriate scale on both axes. An old-fashioned single-play vinyl record rotates on a turn-table at 45 rpm. What are (a) the angular velocity in rad/s and (b) the period of the motion?Explanation / Answer
angle covered for first 2 sec =10*2=20 radian
angle covered for last 2 sec=20*2=40 radian
total angle=20+40 =60 radian
for one cycle=2pi radian
total cycle=60/2pi=9.55 revolution
approx 10 revolution