Question

Please help me precalc?
A wheel with radius 5 cm is being pushed up a ramp at a rate of 7 cm per second. The ramp is 760 cm long, and 260 cm tall at the end

1)Traveling at 7 cm/sec, in one second, how much does the height of the center of wheel increase?
2)Write an equation for the height of the center of the wheel as a function of t, time in seconds.
center height=

3)Write an equation for the height of the point P above the ground as a function of t, time in seconds.
h(t) =

Answer 1

I calculated this so far: the wheel travels 2*pi*5=31.41592654cm in one rotation.
If the wheel travels 2*pi*5=31.41592654cm/sec it will take 31.41592654/7=4.488seconds to complete one rotation.
The initial height is 5cm??...