help pls - thats the further mechanics 2 challenge from exercise 1a.
All i have got is that the ratio of the angular velocities is 10:9 (that's larger:smaller)
idk how to use the info about how after 10 seconds they r at their furthest points - like obviously they are both on the opposite side to where they started but how does that help?
If the angular velocities are in the ratio 10:9, assume one part is "w". What is the relative velocity of one turntable and how far (relative angle) does it move in 10 s? Then solve for w.
If the angular velocities are in the ratio 10:9, assume one part is "w". What is the relative velocity of one turntable and how far (relative angle) does it move in 10 s? Then solve for w.
Which part? If one turntable is rotating 10w anticlockwise and the other 9w clockwise, what is the relative speed of one compared to (a stationary) other? How far (relative, angular) does it need to move in 10s? Then just solve for w.
Which part? If one turntable is rotating 10w anticlockwise and the other 9w clockwise, what is the relative speed of one compared to (a stationary) other? How far (relative, angular) does it need to move in 10s? Then just solve for w.
what is w here? because i have one as w1, and the other as w2, hence 10w1=9w2
i have literally no idea what you are saying when you say "one part is w" - obviously i know how ratios work there is no need to be so annoying
Using your view of ratios, what is the speed of either hand in terms of the other and what is then the relative speed. Its easier (avoids fractions) if you do it as parts.
Using your view of ratios, what is the speed of either hand in terms of the other and what is then the relative speed. Its easier (avoids fractions) if you do it as parts.
ok right so the relative speed is w - omg i understand what you mean. But after 10 seconds, you don't know how many revolutions have occured :/
ok right so the relative speed is w - omg i understand what you mean. But after 10 seconds, you don't know how many revolutions have occured :/
After 10s they are furthest apart for the first time. Not sure the relative speed is w as they're moving in opposite direcdtions, but the usual advice is that a sketch helps.
After 10s they are furthest apart for the first time. Not sure the relative speed is w as they're moving in opposite direcdtions, but the usual advice is that a sketch helps.
ive drawn a sketch and am still lost like actually - i might just give up
There isnt a huge amount to go on there. But If you imagined the blue turntable as fixed, what would be the relative speed of the red one, how far would it have rotated in 10s? Rather than talking about relative speed, you could talk about speed of seperation as it would be equivalent.
There isnt a huge amount to go on there. But If you imagined the blue turntable as fixed, what would be the relative speed of the red one, how far would it have rotated in 10s? Rather than talking about relative speed, you could talk about speed of seperation as it would be equivalent.
if the blue one is fixed, then the speed of the red one is 19w, and after 10 seconds i'm not sure how far it has moved - i swear there is no info about this
if the blue one is fixed, then the speed of the red one is 19w, and after 10 seconds i'm not sure how far it has moved - i swear there is no info about this
In your diagram, youre starting at different locations. If they both started at teh same point (say 12 o clock) and you imagine the blue one fixed, how far would the red one have rotated when its as far frmo the blue one as possible.