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lucidion24
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Hello, I have a mid-term for Physical Science due on Wednesday. It's a 5 question take-home mid-term. Now I know these questions may be trivial to some of you, but I am in college purely for a business degree and have no use for physics. I'm primarily just looking to pass this course. Now, don't think that I don't pay attention in class, because I do. I am a student with a 3.7GPA but I just cannot comprehend the way my instructor is teaching this class.. Anyway, here are the questions. Help with them are greatly appreciated.
1. A 2.5 kg bowling ball slides across the floor with a velocity of 4.0 m/s. The bowling ball has a kinetic energy and momentum of: _______ Joules and ________ kg*m/s
2. If you were to lift the same bowling ball to a height of 4 m above the floor, its potential energy would increase by _______ Joules
3. A freight train rolls along a track with a speed of 10 m/s. If it's speed were increased to 30 m/s, its kinetic energy would be increased by a factor of _______
4. A 100,000kg railroad car traveling at 5 m/s collides with a stationary railroad car of the same mass. If the two cars couple together after the collision, because momentum will be conserved, they will have a speed of ________ m/s
5. The acceleration of gravity at the surface of the Earth is 9.8 m/s^2. If the mass of the Earth could be doubled keeping its radius the same, the acceleration of gravity would then be _________ m/s^2
If I knew, I probably wouldn't be asking..
Once again, if I even knew were to begin, I might have an idea of what these solutions will be.
I am not here for an easy 100.. I would like to be able to understand what is taught. If someone could explain these questions to me in a means in which I would be able to understand, I would appreciate it very much. Time is limited, my exam is due 6PM Tomorrow CST. Thank you for your time, understanding, and help!
1. A 2.5 kg bowling ball slides across the floor with a velocity of 4.0 m/s. The bowling ball has a kinetic energy and momentum of: _______ Joules and ________ kg*m/s
2. If you were to lift the same bowling ball to a height of 4 m above the floor, its potential energy would increase by _______ Joules
3. A freight train rolls along a track with a speed of 10 m/s. If it's speed were increased to 30 m/s, its kinetic energy would be increased by a factor of _______
4. A 100,000kg railroad car traveling at 5 m/s collides with a stationary railroad car of the same mass. If the two cars couple together after the collision, because momentum will be conserved, they will have a speed of ________ m/s
5. The acceleration of gravity at the surface of the Earth is 9.8 m/s^2. If the mass of the Earth could be doubled keeping its radius the same, the acceleration of gravity would then be _________ m/s^2
Homework Equations
If I knew, I probably wouldn't be asking..
The Attempt at a Solution
Once again, if I even knew were to begin, I might have an idea of what these solutions will be.
I am not here for an easy 100.. I would like to be able to understand what is taught. If someone could explain these questions to me in a means in which I would be able to understand, I would appreciate it very much. Time is limited, my exam is due 6PM Tomorrow CST. Thank you for your time, understanding, and help!
