Boxcar Car
Roof Racks: Adding to Car Utility
The excursions induce a new spark in lives of people. They leave you with a fresh state of mind while getting back to work. An activity, which is the most common cause of fuss during a trip, is to handle the luggage. With roof racks and boxes mounted on the top of your car, you will never experience these hassles again. Placing a large part of the luggage inside the boxes or fixing your bike to roof racks, adds to the utility of your car.
Sometimes, you compromise with the sitting space inside the car with placing luggage in it. You avoid using roof racks and boxes. This practice swallows a large amount of the limited space inside your car. As a result, passengers have to sit cramped within the compartment of the vehicle. Excursions are not just about reaching the destination and then enjoy the activities. In order to draw maximum pleasure from a trip, you need to enjoy the whole drive back and forth the destination.
Mounting car roof boxes and racks atop your car, leaves you with good space inside the car. This affects the comfort of the journey. These car accessories act as storage enhancement devices. An increased storage space of the car adds to the utility of the user. Roof racks come in many shapes and sizes according to your car type. You do not need to mount a mighty roof rack or roof box on your small sized car. Just find out an appropriate rack or box online.
Nevertheless, if you are one of the mountain biking enthusiasts then roof racks are among the perfect car accessories for you. You can place your All-Terrain-Bike on the rack and leave for an ultimate mountainous expedition. Make your travel comfortable with these car accessories.
About the Author
Garry Kelkar is an expert writer having perfection in automobile industry and presently writing for car accessories topics like car horns, BMW headlights, car heaters, car audio and so forth.
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A 9000 kg boxcar traveling at 22 m/s strikes a stationary second car. The two stick together and move off with
A 9000 kg boxcar traveling at 22 m/s strikes a stationary second car. The two stick together and move off with a speed of 12 m/s. What is the mass of the second car?
Before the impact the boxcar has kinetic energy E1=m*v^2 = 9000*22^2/2 = 2,178,000 J
where m - boxcar mass, v - it's speed.
At the time of strike some part of energy will "disappear" from the system - both boxcar and car will be damaged (that's where this part of energy goes). If the cars were plasticine - more energy will "disappear" from this system, if the cars were diamond (no damage at all) - all energy of the boxcar will remain as kinetic.
In the latter case (the only case we can answer the given question) kinetic energy after impact E2=E1. E2=M*V^2 => M=E1/V^2
where M - sum mass of boxcar and car, V- their speed after impact.
M= 2,178,000/12^2 = 15,125 kg
That means that cars mass = 15,125 - 9,000 = 6,125 kg
However this is not realistic scenario, because in reality E2