Question: A couple is traveling by car down a straight high-way at 40 km/h. They see an accident in the distance, so the driver applies the

A couple is traveling by car down a straight high-way at 40 km/h. They see an accident in the distance, so the driver applies the brakes, and in 5.0 s the car uniformly slows down to rest.
(a) The direction of the acceleration vector is (1) in the same direction as, (2) opposite to, (3) at relative to the velocity vector. Why?
(b) By how much must the velocity change each second from the start of braking to the car’s complete stop?

Step by Step Solution

★★★★★

3.45 Rating (164 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

a The direction of the acceleration vector i... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

530-P-M-K (425).docx

120 KBs Word File

Students Have Also Explored These Related Mechanics Questions!

A motorboat traveling on a straight course slows uniformly from 60 km/h to 40 km/h in a distance of 50 m. What is the boats acceleration?

A driver notices that her 1150-kg car slows down from 85 km/h to 65 km/h in about 6.0s on the level when it is in neutral. Approximately what power (watts and hp) is needed top keep the car traveling...

A car slows down from 23m/s to rest in a distance of 85m. What was its acceleration, assumed constant?

The stopping distance of an automobile, on dry, level pavement, traveling at a speed v (in kilometers per hour) is the distance R (in meters) the car travels during the reaction time of the driver...

Directions: Use the equation above to answer the following questions. Do not submit for grading. 1. A football field is about 100 m long. If it takes a person 20 seconds to run its length, how fast...

13) Couples Company has a machine with a book value of $75,000 and a remaining five-year life. A new machine is available at a cost of $112,500, and Couples can also receive $60,000 for trading in...

An automobile is traveling on a long, straight high-way at a steady 75.0 mi/h when the driver sees a wreck 150 m ahead. At that instant, she applies the brakes (ignore reaction time). Between her and...

Published by CQ Press, an Imprint of SAGE Publications, Inc. www.cqresearcher.com Future of Cars Are Americans ready for self-driving vehicles? C ars that drive themselves, long a staple of science...

1. What is a tangent line and what is it used for? Sketch an example. 2. What value is the slope of a v vs t graph for a free-falling object? Why? 3. If wind resistance was included in the previous...

6. A satellite in space is travelling at 14 m/s in one direction. A thruster is applied for 30. s and the satellite is then travelling at 12 m/s in the opposite direction. What acceleration does the...

Central Elementary has a huge sandbox with many true-to-scale pieces of construction heavy equipment and dump trucks. He wants to move 200 bank cubic feet (BCF) of sand (swell percentage = 10%) a...

Daniel Kaffe, CFO of Kendrick Enterprises, is evaluating a 10-year, 8 percent loan with gross proceeds of $5,850,000. The interest payments on the loan will be made annually. Flotation costs are...

11.33 Suppose we have a linear equation through the origin (Exercise 11.28) Y |x = x. (a) Estimate the regression line passing through the origin for the following data: x 0.5 1.5 3.2 4.2 5.1 6.5 y...

An unsecured bond is called a debenture bond.true or false.

A horizontal force of 40 N acting on a block on a frictionless, level surface produces an acceleration of 2.5 m/s2. A second block, with a mass of 4.0 kg, is dropped onto the first. What is the...

The Atwood machine consists of two masses suspended from a fixed pulley, as shown in Fig. 4.42. It is named after the British scientist George Atwood (1746 1807), who used it to study motion and to...

An Atwood machine (see Fig. 4.42) has suspended masses of 0.25 kg and 0.20 kg. Under ideal conditions, what will be the acceleration of the smaller mass? 172 182 m28

5. Howton & Howton Worldwide (HHW) is planning its operations for the coming year, and the CEO wants you to forecast the firm's additional funds needed (AFN). The firm is operating at full capacity....

How does Nike use it's WACC for decision making? How does the WACC affect the decisions of a company?

(Computing the standard deviation for a portfolio of two risky investments) Mary Guilott recently graduated from Nichols State University and is anxious to begin investing her meager savings as a way...