I still can't get it I'm thinking about it like aaeba now but it's still wrong in 1 and 2 I think the acceleration would be a because it's both pointing in the negative direction 3 is 0 because it's not moving 4 would be b because it's about to speed up in that direction and 5 is a because it's...
Homework Statement
Homework Equations
accelerationThe Attempt at a Solution
I tried the answer:
BAEBB
1 looks like its accelerating up
2 looks like its accelerating down
3 the acceleration looks like it is 0 (v=0)
4 the acceleration looks like its going back up
5 the accleration looks like...
Homework Statement
A girl of mass mg=47 kg is pulling a sled up a slippery slope. The coefficient of friction between the girl's boots and the slope is µs=0.160; the friction between the sled and the slope is negligible. The girl can pull the sled up the slope with a ≤ amax=0.015 m/s2...
Homework Statement
12. [1pt] The unit vector ř that points in the direction of r is given by ř =r/ |r|.
If r = (-7.00)î + (7.00)ĵ find ř.
b)What is the x component and the y component of ř?
Homework Equations
a^2 + b^2 = c^2
The Attempt at a Solution
I don't really understand...
i don't know for the first one would you subtract 0.7m - 0.525m?
and for the second one you would use \lambda = 4L/2n-1 would the answer be 4.25m to 0.00425m?
i had both the right answers but i eraced them and i can't tell what the final answer would be for both them
QUESTION 1
Homework Statement
A guitar string is 0.70m long and is tuned to play an E above middle C (330 Hz). How far from the end of this string must a finger be placed to play A above middle C (440Hz)
Homework Equations
\lambda = 2L/n
\lambda = v/f
v = \lambda x f
The...