Riding the Water Slide A rider on a water slide goes through three different kinds of motion, as illustrated in Figure P3.78. Use the data and details from the figure to answer the following questions. Figure P3.78 79. Suppose the acceleration during the second section of the motion is too large to be comfortable for riders. What change could be made to decrease the acceleration during this section? A. Reduce the radius of the circular segment. B. Increase the radius of the circular segment. C. Increase the angle of the ramp. D. Increase the length of the ramp.
Riding the Water Slide A rider on a water slide goes through three different kinds of motion, as illustrated in Figure P3.78. Use the data and details from the figure to answer the following questions. Figure P3.78 79. Suppose the acceleration during the second section of the motion is too large to be comfortable for riders. What change could be made to decrease the acceleration during this section? A. Reduce the radius of the circular segment. B. Increase the radius of the circular segment. C. Increase the angle of the ramp. D. Increase the length of the ramp.
A rider on a water slide goes through three different kinds of motion, as illustrated in Figure P3.78. Use the data and details from the figure to answer the following questions.
Figure P3.78
79. Suppose the acceleration during the second section of the motion is too large to be comfortable for riders. What change could be made to decrease the acceleration during this section?
The Nardo ring is a circular test track for cars. It has a circumference of 12.5 km. Cars travel around the track at a constant speed of 100 km/h. A car starts at the easternmost point of the ring and drives for 15 minutes at this speed.a. What distance, in km, does the car travel?b. What is the magnitude of the car’s displacement, in km, from its initial position?c. What is the speed of the car in m/s?
In 1780, in what is now referred to as “Brady’s Leap,” Captain Sam Brady of the U.S. Continental Army escaped certain death from his enemies by running horizontally off the edge of the cliff above Ohio’s Cuyahoga River, which is confined at that spot to a gorge. He landed safely on the far side of the river. It was reported that he leapt 22 ft across while falling 20 ft. Tall tale, or possible?a. What is the minimum speed with which he’d need to run off the edge of the cliff to make it safely to the far side of the river?b. The world-record time for the 100 m dash is approximately 10 s. Given this, is it reasonable to expect Brady to be able to run fast enough to achieve Brady’s leap?
In the Soapbox Derby, young participants build nonmotorized cars with very lowfriction wheels. Cars race by rolling down a hill. The track at Akron’s Derby Downs, where the national championship is held, begins with a 55-ft-long section tilted 13° below horizontal.a. What is the maximum possible acceleration of a car moving down this stretch of track?b. If a car starts from rest and undergoes this acceleration for the full 55 ft, what is its final speed in m/s?
Chapter 3 Solutions
College Physics: A Strategic Approach (3rd Edition)
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