A railroad car that weighs 20000lb is traveling eastward

Assignment Help Civil Engineering
Reference no: EM13383497

A railroad car that weighs 20,000lb is traveling eastward with a velocity whose magnitude is 5 fps. A second car, on the same track, that weighs 40,000lb is also traveling in an easterly direction with a velocity of 7.81fps. When the cars collided, they became coupled together and then both cars moved with the same velocity. If friction between the cars and the rails is neglected, what were the magnitude and the direction of the velecity of the cars after the collision? 

Reference no: EM13383497

Questions Cloud

Suppose a can contains gas at a pressure of 755 mm hg and a : suppose a can contains gas at a pressure of 755 mm hg and a temperature of 25 degrees celsius what would be the
In the circuit shown in figure a-4 the zener diode is : in the circuit shown in figure a-4 the zener diode is rated at 5.6 v and is operating in the zener region. if the
A rectangular block has dimensions 29 cm 35 cm 100 cm the : a rectangular block has dimensions 2.9 cm . 3.5 cm . 10.0 cm. the mass of the block is 615.0 g. what are the volume and
Diethyl ether is a volatile organic compound the vapor : diethyl ether is a volatile organic compound. the vapor pressur of diethyl ether is 401 mmhg at 18 degrees c and th hat
A railroad car that weighs 20000lb is traveling eastward : a railroad car that weighs 20000lb is traveling eastward with a velocity whose magnitude is 5 fps. a second car on the
A sample of he gas has a volume of 900 ml and a pressure : a sample of he gas has a volume of 900 ml and a pressure 2.50 atm at 298 k. what is the new? pressure when the
An mos transistor is fabricated on a p-type silicon : an mos transistor is fabricated on a p-type silicon substrate with na2x1015 cm-3. the oxide thickness is tox450a and
A 70g piece of ice at 0c is added to a sample of water at 6 : a 70g piece of ice at 0c is added to a sample of water at 6 c all of the ice melts and the temp of the water decreases
A series rlc circuit has a 4ohm resistor an inductor with : a series rlc circuit has a 4ohm resistor an inductor with an xl of 19.5 ohms and a capacitor with an xc of 12 ohms.

Reviews

Write a Review

Civil Engineering Questions & Answers

  Determine the elastic modulus of the composite material

An SAE steel wire (1mm diameter) is coated with another cover to form a composite material with diameter of 2 mm. a) determine the elastic modulus of the composite material;

  Calculate total mass emissions of particulates out of stack

The temperature in the stack is 350 degrees F and the pressure is 725 mm Hg. If the total flow rate of gas out of the stack is 200 standard cubic meters per second, calculate the total mass emissions of particulates out of the stack in kg/day.

  How long will it take for concentration to be one-quarter

A batch system is assumed to be first order. The initial concentration is 225 mg/L. If the reaction rate constant is 0.65 hr^-1, how long will it take for the concentration to be one-quarter the starting concentration

  Determine the dimensions of the pit that minimizes cost

Assume excavation costs at $100/m3, side lining costs at $50/m2, and cover cost at 25/m2. Determine the dimensions of the pit that minimize cost -If the side slope is unconstrained and -If the side slope must me less than 450

  Find the depth of runoff from the land surface in inches

The drainage area upstream of a small dam is 20 acres. On a certainday the pond was 9 feet deep with a surface area of 1.6 acres. That night, a 5.4 inch rainstorm caused a large rise in the pond.

  Determine the design speed of the curve with the pvc

An egual-tangent sag vertical curve is designed with the PVC at station 109+00 and elevation 950 ft, the PVI at station 110+77 and elevation 947.34 ft, and the low point at station 110+50.

  Sketch the cycle on p-v coordinates

A quality of water within a piston-cylinder assembly executes a Carnot power cycle. During isothermal expansion, the water is heated from saturated liquid at 50 bar until it is a saturated vapor. The vapor then expands adiabatically to a pressure ..

  Determine the time required to bring the train to a stop

The subway train shown is traveling at a speed of 30 mi/hr in the west direction when the brakes are fully applied on the wheels of cars B and C, causing them to slide on the track, but are not applied on the wheels of car A.

  What is the value of m2 that could be carried by column

The column is braced. The column is required to carry N*=0.75phiNuo kN. What is the value of M2* that could be carried by column considering the slenderness effect. M1*= 0.8M2* Nuo=1000kN r=120mm

  Determine the additional tension in each wire

The rigid bar AD is supported by two steel wires of (1/16)" diameter (E=29x10^6 psi) and a pin and bracket at D. Knowing that the wires were initially taut, determine (a) the additional tension in each wire when a 120-lb load P is applied at B

  Determine the normal stresses induced in portions ab and bc

A rod consisting of two cylindrical portions AB and BC is restrained at both ends. Portion AB is made of steel (E=29x10^6 psi, α=6.5x10^-6) and portion BC is made of aluminum (E=6.5x10^-6 psi, α=13.3x10^-6).

  Write a loop that will estimate the value of the moody f

Use input values of epsilon (B1), pipe radius (B2), and Reynolds number (B3) to estimate "f" and place these in the same cells . Display the final answer in a message box and round to five figures. Use a short cut key of Ctrl+g

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd