Thinking Like an Engineer: An Active Learning Approach (3rd Edition)
3rd Edition
ISBN: 9780133593211
Author: Elizabeth A. Stephan, David R. Bowman, William J. Park, Benjamin L. Sill, Matthew W. Ohland
Publisher: PEARSON
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Chapter 6, Problem 2RQ
- 2. A circus performer jumps from a platform onto one end of a seesaw, while his or her partner, a child of age 12, stands on the other end. How high will the child “fly”?
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1. You are setting up for a pool party that has a 2.5 m high slide that launches
swimmers into the pool. To make it more exciting, you decide to string a steamer
across the pool so that the swimmers just clear it at their maximum height after
leaving the slide. The end of the slide is 0.75 m above the ground and is directed
20° above the horizontal. By watching people use the slide, you know the horizontal
distance to place the streamer, so you only need to determine the maximum height.
You are also curious how fast the swimmers are going when they enter the pool. In
your estimates, you can assume that the swimmer starts at rest at the top of the slide
and ignore friction on the slide and air resistance.
2.5 m
0.75 m
streamer
If the angle of the slide were different (say 15°) would either the maximum height or
the speed when entering the water be different?
Note: Use conservation of energy to answer these questions.
Question 11) Roger gave the following account of a roller-coaster ride:
1 tried a brand-new ride at a science centre. There's a computer screen that tells you
how much the car and the people in it weigh and how high and fast you travel. You get
into the car and they strap you in. The car weighs 600 kg. At the top, it moves
horizontally at a speed of 1 m/s. Then you drop 30 m, make a loop into the air and finish
by riding over an 8-m hill. I don't remember our maximum speed or our speed at the top
of the loop, but the ride was fantastic!"
Answer the following questions without taking the force of friction into consideration.
Show your calculations for each question.
A v=1 m/s
20 m
8 m
a)
What is the highest speed Roger could have attained?
What is the potential energy of the roller-coaster car when it is at the top of the
b)
loop?
c)
What is the kinetic energy of the car as it passes over the top of the 8 m hill?
d)
What is the total mechanical energy of the system?
A projectile object reaches a height of 303 m, if it is fired straight
up using a spring-loaded gun. Using the same gun, what is the
maximum height (m) that can be reached by the projectile if it
fired at an angle of 19 ° from the vertical?
Chapter 6 Solutions
Thinking Like an Engineer: An Active Learning Approach (3rd Edition)
Ch. 6.1 - We use SOLVEM to complete this problem in the...Ch. 6.1 - State the objective and any relevant observations...Ch. 6.1 - Create a list of variables and constants for the...Ch. 6.1 - Create a list of equations for the following...Ch. 6.2 - Manipulate and solve for the following problem,...Ch. 6 - Final Assignment of this ICA: You have done...Ch. 6 - A hungry bookworm bores through a complete set of...Ch. 6 - Two cargo trains each leave their respective...Ch. 6 - Water drips from a faucet at the rate of 3 drops...Ch. 6 - During rush hour, cars back up when the traffic...
Ch. 6 - Suppose that the earth were a smooth sphere and...Ch. 6 - Chapter 6 Review Questions Analyze the following...Ch. 6 - 2. A circus performer jumps from a platform onto...Ch. 6 - 3. Your college quadrangle is 85 meters long and...Ch. 6 - 4. I am standing on the upper deck of the football...Ch. 6 - 5. A 1-kilogram mass has just been dropped from...Ch. 6 - 6. Neglect the weight of the drum in the following...
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