Question 1141494
(a)
Diameter of the wheel is twice the amplitude
of the sine wave {{{ 6 + 2 = 8 }}}
(b)
The period ( 1 revolution ) can be measured
from peak to the next peak {{{ 12 - 4 = 8 }}} s
(c)
About 3 sec each cycle is below the {{{ h=0 }}} line
(d)
When {{{ t=0 }}}, {{{ h = -2 }}}
4 cycles later, at {{{ t=32 }}}, the height is -2 again
In 4 more sec, at {{{ t = 36 }}}, the height is maximum
{{{ h = 6 }}}