Homework Statement
A 30cm diameter wheel rolls without slipping at 120rpm. The point of contact with the ground has an instantaneous speed of:
a-5.2mm/s
b-1.04cm/s
c-2.6 m/s
d-zero
Homework Equations
I'm not really sure about my final answer but i think is d-zero because i have a...
Got it!
so i got the derivative v=8t-9t^2 and then i got -20 after i pluged in my v1 and v2 then divided it by two and that gave me -10m/s^2! (right answer)
Thanks for your help! :biggrin:
the instantaneus velocitiy formula is V= dx/dt but I still need to know what to do with the given function... i don't know how to use the given funtion to get the answer. If I was given the v1 and v2 in m/s i would just take the difference of v1 and v2 divide it by the time but that functions...
Homework Statement
Okay here's the problem, The coordinate of an object is given as a function of time by x = 4t^2 - 3t^3, where v is in m/s and t is in seconds. Its average acceleration over the interval form t = 0 to t = 2
I wast told the answer is -10m/s^2 but i can't figure out how...