ISN'T IT A LOT OF FUN TO DO STUDYING INSTEAD OF HOMEWORK?

ESPECIALLY WHEN YOU REALLY REALLY DON'T NEED TO DO ANY REVIEW BECAUSE THIS SHIT IS SUPER EASY.

I'm "taking notes" on "test review."

1. How hard something is to rotate around its center of mass is its MOMENT OF INERTIA.
2. The ratio of an object's volume to its mass is its DENSITY
3. The momentum of a 2kg hockey puck that slides at 20m/s across an icy lake is MASS TIMES VELOCITY, so 40 kg*m/s.
4. A rectangular block of aluminum has dimensions 1x1x6 (all inches). The density of aluminum is 2700 kg/m^3. How much does the block of aluminum weigh? 1 INCH = 0.0254 METERS, then DENSITY TIMES VOLUME EQUALS MASS, then WEIGHT EQUALS MASS TIMES GRAVITY.
5. The Earth has a mass of 5.98x10^24 kg and an average radius of 6.37x10^8 m. What is the density of the Earth? VOLUME OF A SPHERE IS (4/3 PI R^2) and DENSITY IS MASS OVER VOLUME.
6. Which has the greater momentum: a motorcycle that weighs 500 lbs moving at a speed of 5mph, or a bullet weighing 15oz moving at 900 m/s? LOTS OF CONVERSIONS; momentum equals MASS TIMES VELOCITY; compare.
7. The amount of mass that flows through something per unit of time is the MASS FLOW SOMETHING
8. The closer the mass is located to the center of rotation, the harder it is to rotate the mass about the given center of rotation. FALSE.
9. A 600 kg car has a momentum of 18000 kg*m/s; how fast is the car moving? VELOCITY EQUALS MOMENTUM OVER MASS.
10. It takes 20 seconds to fill a 2L bottle with water from your faucet. What is the mass flow rate from the faucet if water has a density of 1000 kg/m^3? 1L=1000 MM^3
11. A roll of aluminum foil from the grocery store is 12 inches by 75 feet; if the foil is 0.006 inches think and the density of aluminum is 2700 kg/m^3, what is the mass of the roll of foil? WHY IS THIS ALL JUST CONVERSIONS AND DENSITY AND MOMENTUM.
12. Weight is THE FORCE ON A MASS DUE TO GRAVITY.
13. If you drop your textbook, it falls because the earth pulls it downward. At the same time, your textbook pulls on the earth with a force that is EQUAL IN MAGNITUDE, OPPOSITE IN DIRECTION.
14. Forces tend to MOVE, ROTATE, ELONGATE objects.
15. A force of 10 N causes a spring to stretch 50 cm (0.5 m). What is the spring constant? F=kx. 10 N=k(0.5 m); k=20 N/m
16. The quantity that represents a measure of how easily a given fluid can flaw is known as VISCOSITY.
17. If an object is moving and there are no unbalanced forces acting on it, the object will CONTINUE MOVING AT CONSTANT VELOCITY.
18. If you push on your textbook so that it slides across the table at a constant velocity, ALL THE FORCES ACTING ON THE BOOK MUST BE BALANCED.
19. A tow truck exerts a force of 2000 N on a car, causing it to accelerate at 4 m/s. What is the mass of the car? F=ma; 2000 N=m(4 m/s), so m=500 kg.
20. The force that accelerates a car is THE ROAD PUSHING ON THE CAR.
21. A "suction cup" sticks to the wall because it is PUSHED TO THE WALL BY THE ATMOSPHERE.
22. A see-saw has a 50 lb child sitting at one end, 10 ft from the fulcrum. How far from the fulcrum should a 125 lb adult sit in order to balance the seesaw?
23. While using a pushmower to mow your lawn, you notice that you push with a constant horizontal force of 75 N. How much work do you do while pushing the lawnmower a total distance of 25 km on level ground? IF YOU HAVE TO PUSH YOUR LAWNMOWER 25 KM, YOUR LAWN SUCKS AND YOU SHOULD PAY SOMEONE TO MOW IT FOR YOU; WORK IS FORCE TIMES DISTANCE; ALSO YOU'RE NOT ACTUALLY APPLYING A HORIZONTAL FORCE, BUT I GUESS IT'S FAIR FOR THEM TO HAVE ALREADY FOUND YOU THE HORIZONTAL COMPONENT OF THE FORCE.
24. While driving down the highway, your car must overcome the forces of friction and air resistance in order to keep the car moving. Experiments have indicated that a force of 560N is needed to keep a car moving at a constant speed. While driving the car a distance of 100,000 m, the car burns up 2.8 gal of gas. If gasoline is 100,000,000 J per gallon, what is the efficiency of the car's engine? EFFICIENCY IS OUTPUT OVER INPUT. OUTPUT IS THE WORK DONE, INPUT IS THE POTENTIAL ENERGY OF GASOLINE.
25. How much kinetic energy does a 3kg soccer ball have while moving at 20 m/s toward your opponent's goal. KE=(1/2)mv^2.
26. Which produces the greater change in kinetic energy (assume that all work goes into kinetic energy)? 10N force over 5m? 20N over 2m? 30N over 1.5m?
27. Which of the following requires the most work done by the brakes of the car? Slowing from 80 mph to 55? stopping from 55 mph?
28. A stone is dropped from a bridge and allowed to free-fall downward. As it falls a certain distance, its potential energy decreases by 1000 J. By how much does the stone's kinetic energy increase? ENERGY CONSERVATION, SO 1000 J.
29. There's a sketch of a bowling ball return. Estimate the required speed of the ball at point 1 (on flat ground) so that it reaches point 2 (after going up) with a speed of 2 m/s. Point 2 is a hoight of 0.75m above the ground. CHANGE IN E = 0; I THINK WE JUST PLAY WITH KE AND PE AT THE BEGINNING AND THE END AND FIGURE OUT V FROM KE=(1/2)MV^2.
30. In general, efficiency is defined as OUTPUT OVER INPUT.
31. The largest source of electric power in the US is I DON'T KNOW PROBABLY COAL.

Sorry about blog posting this; OpenOffice was taking too long to load, and I didn't really feel like missing these, since on the last test I didn't come for the review class thing and blah blah, long story short I got the wrong scantron and it was a pain in the ass.