Question 3 (1 point) A rubber band stretched as far as it will go (without breaking) is a good example of an equilibrium position. a. True b.
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1 Name: Schoology Review Question 1 (1 point) Which answer best describes elastic potential energy? a. Elastic potential energy refers to the rigidity of an elastic material. b. Elastic potential energy refers to the energy of an un-stretched rubber band. c. Elastic potential energy refers to the breaking point of an elastic material. d. Elastic potential energy refers to the energy of a stretched object. Question 2 (1 point) If a bow is drawn with a stretch of 0.33 meters and a spring constant of 5, determine the elastic PE. a b c d Question 3 (1 point) A rubber band stretched as far as it will go (without breaking) is a good example of an equilibrium position. Question 4 (1 point) If a rubber band has a stretch of 1.5 meters and a spring constant of 4, determine the elastic PE. a. 6 b. 4.5 c d. 9 Question 5 (1 point) Potential Energy is best defined as: a. Stored energy of position b. Stored energy of motion c. Stored energy d. Stored energy of elevation Question 6 (1 point) In relation to gravitational PE and elastic PE, lifting up on an object is similar to pulling back on a rubber band. Question 7 (1 point) One major difference between gravitational PE and elastic PE is that for elastic PE there is a zero point, but there is not one for gravitational PE. Question 8 (1 point) While on earth, one way to increase your gravitational potential energy is to: a. Run faster. b. Go on a diet. c. Eat more. d. Lay on the ground.
2 Question 9 (1 point) Calculate the gravitational potential energy if your weight is 50 kg and you jump from a tree swing reaching a height of 5 meters off the ground. Question 10 (1 point) From the previous problem, your weight is 50 kg and you jump from a tree swing reaching a height of 5 meters of the ground. After several seconds, you land. What will be your potential energy when you land on the ground? a. 250 J b. 490 J c. 0 J d. 2,450 J Question 11 (1 point) Where does the pendulum have the least amount of gravitational potential energy? Question 12 (1 point) Where will the ball have the most gravitational potential energy?
3 Question 13 (1 point) The following image shows the same spring stretched to a variety of lengths. Which spring has the largest elastic potential energy? Question 14 (1 point) If spring D represents the equilibrium position, which spring would have the largest elastic potential energy? Question 15 (1 point) If a 0.04 kilogram rubber band has a stretch of 0.01 meters past equilibrium and a spring constant of 52, determine the elastic PE. Question 16 (1 point) Where will the cannonball have the highest and lowest gravitational potential energy (circle)? Question 17 (1 point) A bullet from a policeman s handgun travels at 200 meters per second and has a mass of 0.02 kg. If the bullet is 2 meters off the ground, determine the gravitational potential energy. Question 18 (1 point) What on earth would have the greatest amount of kinetic energy? a. Whatever has the most speed. b. whatever has the most mass and speed. c. whatever has the most height. d. Whatever has the most mass.
4 Question 19 (1 point) What on earth would have the least kinetic energy? a. A coasting car b. A thrown pencil c. A sleeping baby d. A moving bike Question 20 (1 point) A car is traveling 50 meters/second and weighs just over 2,000 kilograms. Calculate both KE and PE. Question 21 (1 point) Why does a mosquito have more kinetic energy than a stationary car? a. Because a mosquito is exerting more gravity on the earth than the car. b. Because a mosquito has more speed than a stationary car. c. Because a mosquito is further off the ground than the car. d. Because a mosquito has more mass than the car. Question 22 (1 point) Why does a stationary car have no kinetic energy? a. Since it isn't moving it has no speed. b. Because the engine hasn't been started yet. c. Since it is stationary it has no mass. d. Because there is no gravity unless an object is moving. Question 23 (1 point) What is kinetic energy? a. Energy of stretch or compression b. Work waiting to happen c. Energy of position d. Energy of motion Question 24 (1 point) Is it possible to have both kinetic and potential energy at the same time? a. Yes as long as you are moving at a high rate of speed. b. Yes because all potential energy gets turned into kinetic energy when something is moving. c. Yes because you can be moving even when you are off the ground. d. No because all potential energy gets turned into kinetic energy when something is moving. Question 25 (1 point) How does the PE change for the ball when the height is doubled? a. The PE would stay the same since the mass stays the same. b. The PE would double. c. There is no change since the ball is stationary. d. The PE would be decreased by half.
5 Question 26 (1 point) Which ball has the most gravitational PE? Question 27 (1 point) Assuming the springs are identical and weights A and B are the same, which of the following statements is true regarding the following scenario? a. There is not enough information to determine elastic potential energy. b. A has more elastic potential energy than B. c. B has more elastic potential energy than A. d. A and B have equal elastic potential energy. Question 28 (1 point) Which of the following statements regarding earth's magnetic PE would be true? a. Earth has the greatest magnetic PE the further you move away from the poles. b. Earth has the greatest magnetic PE the further you move away from the equator. c. Earth has the greatest magnetic PE the closer you are to the poles. d. Earth has the least magnetic PE the closer you are to the equator. Question 29 (1 point) Which of the following best describes a similarity between magnetic and gravitational PE? a. Both PE's decrease the further off the ground they are. b. Both PE's decrease with increasing mass. c. Both PE's increase as gravity increase. d. Both PE's increase the further they are away from the equilibrium point.
6 Question 30 (1 point) Haley complained that she didn t know any similarities between three of the different types of potential energies. Zach snapped back that it was easy. Which of the following would be a true statement from Zach? a. Decreasing the compression of a spring, decreasing the height of a ball above the ground, and decreasing the distance a paper clip is away from a magnet are all ways to increase PE. b. Increasing the compression of a spring, increasing the height of a ball above the ground, and decreasing the distance a paper clip is away from a magnet are all ways to increase PE. c. Increasing the compression of a spring, increasing the height of a ball above the ground, and increasing the distance a paper clip is away from a magnet are all ways to increase PE. d. Increasing the size of a spring, decreasing the size of a ball, and decreasing the size of a paper clip near a magnet are all ways to decrease PE. Question 31 (1 point) A toy dart gun has a spring constant of 20. If the spring is compressed 0.2 meters, what would the elastic potential energy be? Question 32 (1 point) When a golf ball is hit, it travels at 41 meters per second reaching a height of 50 meters and for a distance of 300 meters. The mass of a golf ball is kg. What is the gravitational potential energy of the golf ball? Question 33 (1 point) Mr. DelliGatti (all 86 kilograms of him) decides to break the Guinness Book of World Records for bungee jumping. He goes to the Macau Tower in China where the current record is held. After several heartpounding seconds, he leaps from a height of 233 meters. I almost hit the ground but luckily I snap back up towards the top of the building. What was my potential energy just before hitting the ground? Question 34 (1 point) Increasing the spring constant on a dart gun's spring from 20 to 40 will decrease the elastic potential energy making the dart fly further.
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