Following formula shows the veloctiy, vms-1, at time t seconds for the first 8 seconds of motion:
v=(60t^2-5t^3)/64
Find the acceleration when t=8
I know you have to differentiate and i got 120t-15t^2
However, the mark scheme says to reduce the mark if 64 is left off - why would you leave 64 on?
Equally when I intergrate the formula, apparently 64 is not 64t but just 64, why?
Thanks Very Much