4. A father demonstrates projectile motion to his children by placing a pea on his fork's handle and launches the pea at 8.35 m/s at an angle of 75.0 above the table. With what speed does the pea strike the ceiling 2.00 m above the table? Hints - First calculate the x and y velocity at point A then look at the x and y directions separately. You should find the x and y velocities at point B then add those vectors together to get the answer of VB = 5.52 m/s B 2.00 m Vo = 8:35 m / s 4 75.0 Vax = 0 A6. A celebrated Mark Twain story has motivated contestants in the Calaveras County Jumping Frog Jubilee, where frog jumps as long as 2.2 meters have been recorded. If a frog jumps 2.2 meters and the launch angle is 45, find (a) the frog's launch speed and (b) the time the frog spends in the air. Answer - initial speed of frog = 4.6 m/s alot ismon ent baff of eixe "he ordi gnots gashua level's no unites allaold andT (o This is a tricky one! Use VA as the initial speed. Then you can write VAX= VA (cos 45) and VAy=VA (sin 45) Then use Ay= Vay t + 1/2 ay t2 and AX= VAX t + 1/2 ax t2 (go from the beginning point of the jump to the ending point of the jump) You will then have 2 equations with 2 unknowns (each equation will have VA and t) free . 2:2 meters 2. 2 launch un 282 2