The approach I think you can take is to find the center of mass of the water when the tank is full and then find the center of mass of the same water volume when the water level is in the box car (i.e. after it has leaked). The center of mass should change because the tank is narrower than the boxcar.
So you can look at the water mass as moving from one height to another (i.e. change is center of mass). Take the entire mass of the water as the object that is moving. We then can use the conservation of energy to find the velocity of the boxcar. If the water were free-falling, then the speed would be along the y-axis. However, because the water stays in the boxcar, the y-forces are transferred along the x-axis and the boxcar is on frictionless rails the entire potential energy, <em>m * g * h</em> is converted to kinetic energy <em>1/2 * mv^2</em> Equate these two and solve for v. Note that the final velocity does not depend on mass at all, but you will need h, which will be the distance the center of gravity of the water system has moved.
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ANSWER: 170 Feet
REASON: with good breaks and a dry road your car should stop and skip 170 feet, with perception and reaction time of stopping you should stop within 170 feet
Answer:
The energy would remain equal to that of the initial kinetic energy since it is a frictionless surface. However if it is an inelastic collision then energy would be lost due to sound and heat.
Explanation:
Answer:
4750000 J
Explanation:
Kinetic Energy= 1/2* mass* velocity²
1/2*950*100²=4750000
Answer:
long-term
Explanation:
usually a short term goal is able to be accomplished in a week or two. the question gives a 3 month time frame for the person to build up to the end goal.
