[填空题]
The downward speed, V, in metres per se.3gj ia 9jol.0hm zlvn ztf*)1c ,dqz kpclut5r 9g*sv+t ,fj);w88s dlond, of a skydiver t seconds after a jump frwz +t,*ddcl fu qk)t98sgjrl v5s8, ;pom a plane is modelled by the piecewise function
1.Show that K=60.
2.Draw the graphs of y=60−$\frac{60}{t+1}$, for t≥0, and y=12+$\frac{46}{t-28}$, for t>28,
on the grid below.
3.Find the time T at which the skydiver opened their parachute.
4.Calculate the speed of the skydiver after:
(1)10 seconds; V ≈ m sec$^{-1}$
(2)32 seconds. V ≈ m sec$^{-1}$
Assume that the skydiver's parachute failed to open.
5.Write down the terminal downward speed of the skydiver. m sec$^{-1}$
