(HELP ME PLEASE I NEED TO GET MY GRADE UP PLEASEEE AND THE FIRST TIME I TOOK THE TEST I GOT A 2/10 PLEASE JUST HELP ASAP AND PLEASE GIVE ME THE RIGHT ANSWER
Potential energy can be converted into kinetic energy, a good example of this is when a pole-vaulter bends the pole during a leap. When the pole is bent the most, does it store elastic or gravitational potential energy?
Question 7 options:
It has neither elastic or gravitational potential energy.
The pole stores gravitational potential energy because it is bent from its natural shape when off the ground.
The pole stores elastic potential energy when the pole is bent because its shape is change from its natural shape and it will want to go back to its original form.
Only gravitational potential energy because that is more powerful than elastic potential energy.
Question 8 (1 point)
Is the potential energy of the roller coaster elastic or gravitational?
Question 8 options:
gravitational
neither
both
elastic
Question 9 (1 point)
In the EXPLORE section of your lesson 4.08 on Potential energy there were several animations to watch that provided a graphic illustrating how the PE and KE in a system changed as skateboarder rides a pipeline or a pendulum moves, why did the bar for the total energy remain constant?
Question 9 options:
all answers given are correct
Because these models do not take into account the impact of friction and air resistance and are helping to solidify the concept of energy conservation and that the total mechanical energy remains constant in that model.
Energy is converted from kinetic to potential and potential to kinetic, but the total amount of energy is conserved.
This is because no energy is being created or destroyed in this system.
Question 10 (1 point)
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In class we learned that a car model with a mass of 5.0 kg that is placed on a track 3.0 m off the ground and is traveling at a speed of 4 m/s. Has a measurable kinetic and potential energy. Calculate the total mechanical energy of the object using the formula ME = KE + PE when the KE is 40 joules and the PE is 147 joules. (You may use your calculator on this addition problem.)
Question 10 options:
187 J
147 J
40 J
60 J
Answers: 2
Physics, 22.06.2019 07:50
2. -/1 pointsserpse10 2.7.p.017.mi. an object moving with uniform acceleration has a velocity of 14.0 cm/s in the positive x direction when its x coordinate is 2.97 cm. if its x coordinate 2.85 s later is -5.00 cm, what is its acceleration? cm/s2 need ? read it master it
Answers: 1
Physics, 22.06.2019 12:00
Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?
Answers: 1
Physics, 22.06.2019 14:50
Nitrogen (n2) undergoes an internally reversible process from 6 bar, 247°c during which pν1.2 = constant. the initial volume is 0.1 m3 and the work for the process is 121.14 kj. assuming ideal gas behavior, and neglecting kinetic and potential energy effects, determine heat transfer, in kj, and the entropy change, in kj/s. show the process on a t-s diagram.
Answers: 2
Physics, 23.06.2019 01:00
Carmen is load furniture and boxes onto a moving truck. she picks up boxes of her things, places them on a cart, and pushes the cart to the moving van. which term best describes the type of force carmen uses? a. contact b. friction c. gravity d. noncontact
Answers: 2
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