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# Quick A level Physics help Watch

1. I just disagree with answer and now am confused:
Q: "Use your knowledge of physics to state if each statement is correct or incorrect"
.....
"(b) A ball is thrown vertically upwards. Air resistance has negligible effect on its motions. During the flight, the total energy of the ball remains constant"

So I put incorrect, because obviously air resistance is what makes the ball slow down and meet its maximum height. I also thought they were going to be annoying and say some energy was lost to heat, so I went with incorrect, sounded more plausible to me...BUT APPARENTLY NOPE.
The answers was Correct: Total energy stays the same as KE => GPE and visa versa. They completely ignored the air resistance bit of the statement in the mark scheme... so urmmmm? What?? Lol
2. (Original post by joe12345marc)
I just disagree with answer and now am confused:
Q: "Use your knowledge of physics to state if each statement is correct or incorrect"
.....
"(b) A ball is thrown vertically upwards. Air resistance has negligible effect on its motions. During the flight, the total energy of the ball remains constant"

So I put incorrect, because obviously air resistance is what makes the ball slow down and meet its maximum height. I also thought they were going to be annoying and say some energy was lost to heat, so I went with incorrect, sounded more plausible to me...BUT APPARENTLY NOPE.
The answers was Correct: Total energy stays the same as KE => GPE and visa versa. They completely ignored the air resistance bit of the statement in the mark scheme... so urmmmm? What?? Lol
Oh right lol, figured it out no worries. For anyone else with the same problem in the distant future : the higher it gets, the higher the GPE (as height increases), therefore the lower the KE. This keeps occuring until KE=0 then it falls and same basic stuff. I think xD

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