Chapter 12, Problem 231P

Car A is traveling on the circular road at the constant speed of vå = 60 km/h. At the instant shown, the speed of car B on the overpass is VB = 80 km/h, and it is decreasing at the rate of 1.6 m/s². Find the relative velocity and acceleration vectors (VB/A, aB/A) at this instant. San A 400 m 40° ~ VB B Wonder X M

At the instant shown, the bicyclist at A is traveling at 7 m/s around the curve on the race track while increasing his speed at 0.5 m/s². The bicyclist at B is traveling at 8.5 m/s along the straight-a-way and increasing his speed at 0.7 m/s². Determine the relative velocity and relative acceleration of A with respect to B at this instant. VB = 8.5 m/s 50 m B VA = 7 m/s 50 m 40° A

Cars A and B are traveling around the circular race track. At the instant shown in (Eigure 1), A has a spoed of 85 ft/s and is increasing its spoed at the rate of 15 ft/s, whereas B has a speed of 115 ft/s and is decreasing its speed at 25 ft/s. Figure 300 r 60 Ba 250 f < 1 of 1 Determine the magnitude of the relative acceleration of car A with respect to car B at this instant Express your answer to three significant figures and include the appropriate units. GA/B Submit Templates Symbols undo do reset keyboard shortcuts help 16 Y Part D Value ft $² Previous Answers Request Answer X Incorrect; Try Again: 4 attempts remaining Determine the angle 6 of a (counterclockwise from the positive an axis).

The particle P starts from rest at point A at time t = 0 and changes its speed thereafter at a constant rate of 2.7g as it follows the horizontal path shown. Determine the magnitude and direction of its total acceleration (a) just before point B, (b) just after point B, and (c) as it passes point C. State your directions relative to the x-axis shown (CCW positive) and choose the angle with the smallest magnitude. A B 3.19 m- 3.82 m Answers: (a) Just before B, a = i m/s?, e = i (b) Just after B, a = i m/s2, e = i (c) Passing C, a = i m/s?, e = i

Car A is traveling at the constant speed of 45 km/h as it rounds the circular curve of radius r = 380 m and at the instant represented is at the position 0 = 40°. Car B is traveling at the constant speed of 54 km/h and passes the center of the circle at this same instant. Car A is located with respect to car B by polar coordinates r and with the pole moving with B. For this instant determine VA/B and the values of r and as measured by an observer in car B. Answers: VA/B = r = 0 = i i 8 m/s m/s rad/s B

Part 1 Find vA/B and vA/B- 205 m y B Answers: VA/B = (i i+ i j) m/s VA/B = i m/s

The car is traveling at a speed of 87 mi/hr as it approaches point A. Beginning at A, the car decelerates at a constant 7.1 ft/sec² until it gets to point B, after which its constant rate of decrease of speed is 3.2 ft/sec? as it rounds the interchange ramp. Determine the magnitude of the total car acceleration (a) just before it gets to B, (b) just after it passes B, and (c) at point C. 246 C B 442' Answers: (a) Just before B, a = ft/sec2 (b) Just after B, a = ft/sec2 (c) At C, a = ft/sec2

1. Determine the speed of the motorcycle when it reaches B 2. determine the magnitude of the acceleration of the motorcycle when it reaches B 3. determine the direction of the acceleration of the motorcycle when it reaches B measured counterclockwise from the negative x axis

The car is traveling at a speed of 66 mi/hr as it approaches point A. Beginning at A, the car decelerates at a constant 6.4 ft/sec² until it gets to point B, after which its constant rate of decrease of speed is 3.0 ft/sec? as it rounds the interchange ramp. Determine the magnitude of the total car acceleration (a) just before it gets to B, (b) just after it passes B, and (c) at point C. 221 C B 332'