Chapter 12, Problem 125P

An accelerometer C is mounted to the side of the roller-coaster car and records a total acceleration of 2.8g as the empty car passes the bottommost position of the track as shown. If the speed of the car at this position is 185 km/h and is decreasing at the rate of 28 km/h every second, determine the radius of curvature p of the track at the position shown. Answer: p= i m 0.90 m

speed at B, tangential acceleration at B, total acceleration at B

Q(1): In traveling a distance of 3 km between points A and D, a car is driven at 100 km/h from A to B for t seconds and 60 km/h from C to D also for t seconds. If the brakes are applied for 4 seconds between B and C to give the car a uniform deceleration, calculate t and the distance s between A and B. A 100 km/h B I C T 3 km 60 km/h D 1

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).

In traveling a distance of 3.5 km between points A and D, a car is driven at 87 km/h from A to B for t seconds and 49 km/h from C to D also for t seconds. If the brakes are applied for 3.7 seconds between B and C to give the car a uniform deceleration, calculate t and the distance s between A and B. 87 km/h 49 km/h B 3.5 km Answers: t = i i km

An experimental vehicle A travels with constant speed vrelative to the earth along a north–south track.Determine the Coriolis acceleration aCor as a function ofthe latitude θ. Assume an earth-fixed rotating frame Bxyzand a spherical earth. If the vehicle speed is v = 500km/h , determine the magnitude of the Coriolisacceleration at (a) the equator and (b) the north pole.

To anticipate the dip and hump in the road, the driver of a car applies her brakes to produce a uniform deceleration.  Her speed is 100 km/h at the bottom A of the dip and 50 km/h at the top C of the hump, which is 120 m along the road from A.  If the passengers experience a total acceleration of 3 m/s2 at A and if the radius of curvature of the hump at C is 150 m, calculate (a) the radius of curvature ρ at A. (b) the acceleration at the inflection point B. (c) the total acceleration at C.

In traveling a distance of 3.4 km between points A and D, a car is driven at 119 km/h from A to B for t seconds and 64 km/h from C to D also for t seconds. If the brakes are applied for 3.1 seconds between B and C to give the car a uniform deceleration, calculate t and the distance s between A and B.

Collars A and B slide along the fixed right-angle rods and are connected by a cord of length L= 7.1 m. Determine the acceleration of collar B when y = 2.8 m if collar A is given a constant upward velocity vĄ = 2.42 m/s. The acceleration of B is positive if to the right, negative if to the left. A L Answer: ag = m/s?