Question: A 25 kg mass moves with 25 m/s. Now a brake system brings the mass to a complete stop with a constant deceleration over a

A 25 kg mass moves with 25 m/s. Now a brake system brings the mass to a complete stop with a constant deceleration over a period of 5 seconds. The brake energy is absorbed by 0.5 kg water initially at 20oC, 100 kPa. Assume the mass is at constant P and T. Find the energy the brake removes from the mass and the temperature increase of the water, assuming P = C.

Step by Step Solution

★★★★★

3.22 Rating (160 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

CV The mass in motion E 2 E 1 E 05 mV 2 05 25 2521000 78125 kJ CV T... 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)

774-P-T-F-L (839).docx

120 KBs Word File

Students Have Also Explored These Related Thermodynamics Questions!

A25-kg mass moves at 25 m/s. Now a brake system brings the mass to a complete stop with a constant deceleration over a period of 5 s. Assume the mass is at constant P and T. The brake energy is...

A mass of 1.00 kg of water at temperature T is poured from a height of 0.100 km into a vessel containing water of the same temperature T, and a temperature change of 0.100C is measured. What mass of...

Water is heated from 100 kPa, 20oC to 1000 kPa, 200oC. In one case pressure is raised at T = C, then T is raised at P = C. In a second case the opposite order is done. Does that make a difference for...

Name Date : Period: Momentum & Impulse Worksheet 1 1. A deer with a mass of 146 kg is running head on toward you with a speed of 17 m/s. You are going north. Find the momentum of the deer. 2. A .5 kg...

QUESTION 23 15 points Save Answer there is no rotation. A green car with mass 900 kg is travelling east at 40 m/s. Simultaneously, a yellow car with mass 1600 kg is travelling north at 30 m/s. They...

Answer the following 1. It is defined as the velocity of an object in the rest frame of another object. A. relative motion B. relative velocity C. instantaneous velocity D. instantaneous acceleration...

Final Review Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. Which of the following is a pair of scalar quantities? a. Speed Distance c....

QUESTION 1 A driver in a car traveling at a speed of 28.8 m's sees a deer 100 m away on the road. Calculate the minimum constant acceleration that is necessary of the car to stop without hitting the...

Note: To simplify calculations, you may use g = 10 m/s in all problems.V =7.5 m/s Questions 2-4 refer to the following figure: B C - NWAVAN D velocity (m/s) 1. An object is thrown horizontally to the...

5. Consider a firm endowed with the production function F: R R, given by F(x1, x2)=x1x2, that allows to produce q = F(x1, x2) units of output using , 2 units of inputs 1 and 2, respectively. Given...

The Ethical Dimension The jury awarded Saunders only $1,000 in statutory damages, but in the circumstances, this was the maximum allowed under the FCRA. What does the fact that the jury felt...

17. Simplify each of the following, expressing your answers in positive index form. (a) x'y'z x'y'z x xyz 5. 6 (xyz7 5 (b) x yz + x3y x'y ab" (c) "db12 bc cd "13 + (d) (a+b)" (a+b)**3 #13 bc abc

Lasers can provide highly accurate measurements of small movements. To determine the accuracy of such a laser, it was used to take 100 measurements of a known quantity. The sample mean error was 25...

Determine the missing properties among (T, P, v, s) a. H 2 O 20 C, v = 0.001000 m 3 /kg b. R-410a 400 kPa, s = 1.17 kJ/kg-K c. NH 3 10C, v = 0.1 m 3 /kg d. N 2 101.3 kPa, s = 3.5 kJ/kg-K

Two kilograms of water at 120C with a quality of 25% has its temperature raised 20C in a constant volume process. What are the new quality and specific entropy?

Two kilograms of water at 400 kPa with a quality of 25% has its temperature raised 20C in a constant pressure process. What is the change in entropy?

1. Return on Invested Capital (ROIC) and Economic Value Added (EVA) are commonly used as measures of division management performance. Are these measures equally useful for, say, a consumer goods...

3 f An options portfolio consists of the following positions: 1. Call: Position = -1000, Delta = 0.50, Gamma = 2.2, Vega= 1.8 2. Call: Position=-500, Delta = 0.80, Gamma = 0.6, Vega=0.2 3. Put:...

1. Annualizing Percentage Returns James Leddy and Austin Power compete with each other. Each one argued that he is the best investor. Please be a judge for them. James Leddy bought 200 shares of XYZ...