Physics, 18.02.2020 18:47 johajackson2014
As a box slides down a ramp, friction does 23.0 joules of work. At the bottom of the ramp, the box has 3.8 joules of kinetic energy and is traveling at 2.8 m/sec. How high is the ramp?
Answers: 3
![E_{k}=0.5*m*v^{2}\\\\where:\\E_{k}=3.8[J]\\v = 2.8[m/s]\\m=\frac{E_{k}}{0.5*v^{2} } \\m=\frac{3.8}{0.5*2.8^{2} } \\m=0.969[kg]](/tpl/images/0514/3602/0d41a.png)
![E_{p}+W_{f}=E_{k}\\where:\\E_{p}= potential energy [J]\\W_{f}=23[J]\\E_{k}=3.8[J]\\](/tpl/images/0514/3602/e441b.png)
![m*g*h + W_{f}=3.8\\ 0.969*9.81*h - 23= 3.8\\h = \frac{23+3.8}{0.969*9.81}\\ h = 2.81[m]](/tpl/images/0514/3602/ae510.png)
Other questions on the subject: Physics
Physics, 22.06.2019 05:30, shychk04ot109f
Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.
Answers: 1
Physics, 22.06.2019 17:30, janicemaxwell123
Does heating a metal wire increase or decrease its electrical resistance? why?
Answers: 1
Physics, 22.06.2019 21:00, estebencampos69
Aflask with vinegar in it has a mass of 160 grams. a balloon with baking soda in it has a mass of 40 grams. the balloon is attached to the flask to seal the opening and the vinegar and baking soda mixes. the balloon inflates to a large volume. what will the total mass of the balloon and flask be after the balloon inflates? explain. a) less than 200 grams because the solid baking soda disappears. b) 200 grams, because all the atoms remain in the balloon or flask. c) more than 200 grams because the size of the balloon is so much larger. d) less than 200 grams because gases such as the one in the balloon are lighter than solids and liquids.
Answers: 1
You know the right answer?
As a box slides down a ramp, friction does 23.0 joules of work. At the bottom of the ramp, the box h...
Questions in other subjects:
History, 17.11.2020 20:20
Mathematics, 17.11.2020 20:20
Mathematics, 17.11.2020 20:20
Business, 17.11.2020 20:20
Mathematics, 17.11.2020 20:20
Mathematics, 17.11.2020 20:20
