Physics, 19.05.2021 05:40 ayoismeisalex
HELP PLZ
1) A person wants to move a table from one side of the room to the other. The room is 15 meters across. If that person supplies a constant force of 500 N while pushing the table, how much energy will it take them to move it?
2)A person pushed a shopping cart down an aisle at the grocery store. The entire time that person supplied a constant force of 10 N on the cart. That person did 200 J of work pushing it from one end of the aisle to the other. How long was the aisle?
3) A car is driving down the road. What type of energy is stored in the motion of the car?
4) A person has a mass of 85 kg and is in a building 75 meters high. What is the personās gravitational potential energy? (g = 10 m/s2)
5) A picture with a mass of 3 kg is sitting on a shelf. Its gravitational potential energy is 60 J. How is high is the shelf?
6) An astronaut with a mass of 50 kg is standing on top of a cliff on Mars. The cliff is 20 meters high, and her gravitational potential energy is 3,700 J. What is the value of āgā on Mars?
(g = acceleration due to gravity)
7) A spring with a spring constant of 200 N/m is pulled with a force of 400 N. How far will the spring extend?
8) A spring is pulled with a 100 N force causing it to extend 0.5 meters. What is the spring's spring constant (k)?
Answers: 1
Physics, 21.06.2019 22:30
Which expression allows you to determine the mechanical advantage of an inclined plane? a. height of plane / input force b. length of plane / input force c. length of plane / height of plane d. height of plane / length of plane
Answers: 1
Physics, 22.06.2019 06:10
Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70āc. calculate the work (in kj) done during this process.
Answers: 3
Physics, 22.06.2019 12:10
Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4Ā°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?
Answers: 2
HELP PLZ
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