Brother Bernard is a very large dog with a taste for tobogganing. Ernie gives him a ride
Question:
Brother Bernard is a very large dog with a taste for tobogganing. Ernie gives him a ride down Idiots' Hill---so named because it is a steep slope that levels out at the bottom for 10 m, and then drops into a river. When they reach the level ground at the bottom, their speed is 40 km/h, and Ernie, sitting in front, starts to dig in his heels to make the toboggan stop. He knows, however, that if he brakes too hard, he will be mashed by Brother Bernard. If the co efficient of static friction between the dog and the toboggan is 0.8, what is the minimum stopping distance that w ill keep Brother Bernard off Ernie's back?
Step by Step Answer:
Draw the freebody diagram ...View the full answer
Fundamentals of Ethics for Scientists and Engineers
ISBN: 978-0195134889
1st Edition
Authors: Edmund G. Seebauer, Robert L. Barry
Related Video
Static friction and kinetic friction are two types of friction that occur when two objects are in contact with each other. Static friction is the force that must be overcome to initiate motion between two surfaces that are in contact with each other but are not moving relative to each other. It is caused by the interlocking of rough surfaces at the microscopic level, and it increases as the force pushing the surfaces together increases. Once motion between the surfaces starts, the static friction is no longer present. Kinetic friction, also known as sliding friction, is the force that opposes the motion of two surfaces that are in contact with each other and are moving relative to each other. It is caused by the rubbing of the surfaces against each other and the resistance of the molecules in the surfaces to being moved. Kinetic friction is generally less than static friction, but it can still be a significant force, especially at high speeds. Both static and kinetic friction can be quantified using a coefficient of friction, which is a dimensionless number that represents the ratio of the frictional force between two surfaces to the normal force (the force perpendicular to the surfaces). The coefficient of static friction is typically greater than the coefficient of kinetic friction for a given pair of surfaces, because it takes more force to overcome the interlocking of the surfaces at rest than to maintain motion once it has started.
Students also viewed these Mechanics questions
-
The coefficient of static friction between hard rubber and normal street pavement is about 0.8. On how steep a hill (maximum angle) can you leave a car parked?
-
If the coefficient of static friction between your coffee cup and the horizontal dashboard of your car is s = 0.800, how fast can you drive on a horizontal roadway around a right turn of radius 30.0...
-
The coefficient of static friction between hard rubber and normal street pavement is about 0.90. On how steep a hill (maximum angle) can you leave a car parked?
-
Sheridan Inc. is a retailer operating in British Columbia. Sheridan uses the perpetual inventory system. All sales returns from customers result in the goods being returned to inventory: the...
-
How does the flow of current differ in a superconductor compared with the flow in ordinary conductors?
-
Why are convertible bonds attractive to investors? Why are they popular with borrowers?
-
A certain random process \(U(t)\) takes on equally probable values +1 or 0 with changes occurring randomly in time. The probability that \(n\) changes occur in time \(\tau\) is known to be \[...
-
Pacific, Inc., is a technology consulting firm focused on Web site development and integration of Internet business applications. The president of the company expects to incur $775,000 of indirect...
-
A dog training business began on December 1. The following transactions occurred during its first month. December 1 Receives $22,000 cash as an owner investment in exchange for common stock. December...
-
For the VOC stripping task of Exercise 6.26, the expert has suggested that we use a tower diameter of 0.80 m for which we can expect a pressure drop of 500 N/m2-m of packed height (0.612 in. H2O/ft)....
-
A crate of books is to be put on a truck with the help of some planks sloping up at 30. The mass of the crate is 100 kg, and the coefficient of sliding friction between it and the planks is 0.5. You...
-
A brick slides down an inclined plank at constant speed when the plank is inclined at an angle 0 . If the angle is increased to 1 , the block accelerates down the plank with acceleration a. The...
-
Define what is meant by RAD.
-
Write outline and essay in IRAC form Herb was the licensor for Burger Barn restaurants in the western United States. Herb wrote the following letter to his old friend Gil who lived in New York City:...
-
Chris grew up in New York. After attending college in New York, he decided to go to law school in Florida. When he started law school he signed up for the Florida bar exam, because he decided that he...
-
Jack Corp. has a profit margin of 3.5 percent, total asset turnover of 2.9, and ROE of 18.58 percent. What is this firm's debt-equity ratio?
-
Discuss Europeanperceptionsandtreatmentof Native Americans during the 16thand 17thcenturies by addressing the following questions: Whatnegativeimpressions / assumptions did European explorers have...
-
Where do you stand on the prescription drug pricing standards in place in the United States today? Are we overpaying for prescription drugs? Or are the pricing practices of the pharmaceutical...
-
What is the law of diminishing marginal returns? Will a firm experience diminishing marginal returns in the short run if its production function is: a. \(q=K+L\) ? b. \(q=K L\) ? c. \(q=K L^{0.5}\) ?
-
Dawson Companys balance sheet information at the end of 2019 and 2020 is as follows: Additional information: The company did not issue any common stock during 2020. Required : Next Level Fill in the...
-
Write the ground state electron configuration for each atom and ion pair. a. Ni, Ni+ b. Mn, Mn4+ c. Y, Y+ d. Ta, Ta+
-
A solid sphere of mass m and radius r rolls without slipping along the track shown in Figure P10.79. It starts from rest with the lowest point of the sphere at height h above the bottom of the loop...
-
A boy can throw a ball a maximum horizontal distance of R on a level field. How far can he throw the same ball vertically upward? Assume that his muscles give the ball the same speed in each case.
-
A thin rod of mass 0.630 kg and length 1.24 m is at rest, hanging vertically from a strong fixed hinge at its top end. Suddenly a horizontal impulsive force (14.7i) N is applied to it. (a) Suppose...
-
What is Fibonacci heap? Explain CONSOLIDATE operation with suitable example for Fibonacci heap ?
-
Discuss the impact of global supply chain disruptions, exacerbated by events like the COVID-19 pandemic, on inventory management strategies and market resilience across various industries?
-
A pharmaceutical retailer decided to host a website for home delivery of medicines according to user orders. The web application is deployed on a single Amazon EC2 instances. within a few months, the...
Study smarter with the SolutionInn App