Physics, 25.01.2021 14:10 ublockmon786
Questions 4-6 refer to the following material.
A ball swings freely back and forth in an arc from points I to IV, as shown. Point II is the lowest point
in the path, III is located 0.5 m above II and IV is I m above II. Consider air resistance to be negligible.
IV
111 10.5 m
4. If the potential energy is zero at II, where will the kinetic and potential energies of the ball be equal?
A) At point II
B) At some point between II and III
C) At point III
D) At some point between III and IV
Answers: 2
Physics, 22.06.2019 05:00
Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesnβt, as machines are inefficient. d) no, it doesnβt, as machines cannot create energy.
Answers: 1
Physics, 22.06.2019 05:30
What do you think car designers do if the damage caused by a crash test is too severe?
Answers: 1
Physics, 22.06.2019 09:00
What changes occur in the brain during the teenage years? 25 points, someone me out!a.) thinking becomes slower as the brain grows larger. b.) connections between neurons become stronger and faster. c.) unused neurons fuse together to form larger, better functioning neurons. d.) more neurons are developed.
Answers: 2
Physics, 22.06.2019 09:00
Inside of a windmill or a dam is a that is used to transform one type of energy into electrical energy. a. motor b. generator c. transformer d. power pack
Answers: 2
Questions 4-6 refer to the following material.
A ball swings freely back and forth in an arc from p...
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