The answer would be A. adding the exponents
6 maybe no idea loll very sorry
Roberto has twice the mass his sister Mary has but runs at the same velocity as Mary. Will his kinetic energy be twice as much?
(Mary has a mass of 40 kg and sprints at 1 m/s)
Can someone help me with this (sorry I don’t have enough point for a question and no one has answered this and I’m confused)
Answer:
Step-by-step explanation:
Left hand column
-780 works. The arm swings around the origin like a clock twice which makes - 720. You have - 60 left over so that one works.
- 420 works. The clock hand swings around the origin once clockwise. The arm still has -60 to go . - 60 is what you want.
300 will wind up in the same place as - 60. Both are in the 4th quad in the same place.
660 will do the same thing as 300. 660 - 360 = 300. Both 300 and -60 have same terminal arm.
-1020 looks like it works, but it does not. The clock hand swings around the origin twice. That's - 720. You still have - 300 to go. That puts you in the 1st quadrant not the 4th.
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Right hand column
You have to be careful with this one. The reasoning is just slightly different.
145 degrees is in the second quadrant. If you have - 215, the arm will wind up in the same place as 145 (in the second quadrant). What you are looking for is something that is either 145 or - 215
-575 = one revolution around (360) with a remainder of -215 so this one works.
-215 works. See introductory statement for this problem.
505 works. 505 - 360 = 145. The arm swings around the +x axis once and the remainder is 145.
865 works. The terminal arm swings around the + axis twice and gives 865 - 2*360 = 865 - 720 = 145.
Step-by-step explanation:
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