Energy of motion unit test I NEED ANSWERS PLZZZZZ
1. Energy of motion.
2.when the ball reaches its highest point
3. Naveed’s object had greater kinetic energy.
4. She should drop two balls with different masses from the same height.
5.10 grams of water, falling at 1 m/s
6.The spot with the “maximum kinetic energy” should be on the lowest point of the roller coaster, at the far left side on the bottom.
7.rapids dam: fall height of 175 feet
8. to allow the kinetic energy of the water to increase greatly before reaching the turbines
9. when the swing is pulled back prior to release
10. (My answer) At max height of swing, potential energy is greatest, kinetic energy is least. At the bottom of the arc, potential energy is least, and kinetic energy is max
11. (My answer) The 16 pound shot will have more kinetic energy that the 12 pound shot. This is because the 16 pound shot is heavier than the 12 pound shot. Even though the 12 pound shot went farther, that doesn't mean it has more kinetic energy.
says the girl who dose not know how to spell dum or stupid
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(1) A city gets its electricity from a dam, where water is stored in a reservoir. How does the water provide the city with its power?
(D) Potential energy in the water becomes kinetic energy as it moves through turbines, which turn kinetic energy into mechanical energy that spins a generator, which changes mechanical energy into electricity.
(2) An acorn rolls off a roof and falls to the ground. Which statement best describes the change in energy?
(A) The acorn’s potential energy decreases as its kinetic energy increases.
(3) An airplane carries 320 passengers from Phoenix to Los Angeles flying at an average speed of 490 miles per hour. On the return flight, the plane carries 164 passengers and travels at the same average speed. What happens to the plane’s kinetic energy?
(C) On the return flight, the plane has less kinetic energy.
(4) A racehorse is running at 42 miles per hour, equivalent to 18.8 meters per second. The horse and its jockey have a combined mass of 512 kilograms. How much kinetic energy do they have?
(D) 90,480.6 J
(5) Which object has kinetic energy?
(A) balloon rising in the sky
(6) Mr. Starr pushed a cart full of groceries to his car. After emptying the cart, he pushed it back to the store. He pushed the cart at a speed of 2 meters per second each way. Which is the best prediction?
(D) When it was empty, the cart had less kinetic energy.
(7) A student fires a toy rocket into the sky. When does the rocket have the most potential energy?
(B) when the rocket reaches its highest point
(8) What is the best description of one billiard ball hitting a second billiard ball?
(A) Most of the kinetic energy in the first ball is transferred to the second ball.
(9) A roller-coaster car is at the top of a hill. The car and its passengers have a combined mass of 1,088 kilograms. If the hill is 62 meters tall, how much potential energy does the car have?
(A) 661,068.8 J
(10) A roller-coaster is at the top of a 62-meter hill. The car and its passengers have a total mass of 1,088 kilograms. By the time the car reaches the bottom of the hill, its speed is 74 miles per hour (33 meters per second). How much kinetic energy does the car have at the bottom of the hill?
(A) 592,416 J
(11) A diagram is drawn showing a swing set with a swing pulled backward prior to release. The diagram shows how the swing will move forward and then backward after it is initially released. At which point in the diagram is all of the energy gravitational potential energy?
(D) when the swing is pulled back prior to release
questions 12 and 13 are essays
Correct connexus is 100% corrcect the two other items are still grading though because u write it but when they said those two make sure to change them up a bit
You after like knowing that the Mitochondria is the powerhouse of the cell is usefully. I just need to know how to write a resume
Correct connexus is 100% correct
Thanks for the help bro!