A fielder in a cricket match throws the ball to the wicket-keeper. At one moment of time, the ball has a horizontal velocity of 16 ms and a velocity in t the vertically upward direction of 8.9 ms ¹

(a) Determine, for the ball :

Its resultant speed

Two students are on a balcony a distance h above the street. Onestudent throws a ball vertically downward at a speed vi; at thesame time, the other student throws a ball vertically upward at thesame speed. Answer the following symbolically in terms of vi, g, h,and t. (Take upward to be the positive direction.)

(b) Find the velocity of each ball as it strikes the ground.
For the ball thrown upward vf = ?
For the ball thrown downward vf = ?

(c) How far apart are the balls at a time t after they are thrownand before they strike the ground?
d = ?

I couldn't do b or c...anyone help!?

Two students are on a balcony a distance h above the street. One student throws a ball vertically downward at a speed v1; at the same time, the other student throws a ball vertically upward at the same speed. Answer the following symbolically in terms of v1, g, h, and t. (a)What is the time interval between when the first ball strikes the ground and the second ball strikes the ground? (b)Find the velocity of each ball as it strikes the ground. (c)How far apart are the balls at a time t after they are thrown and before they strike the ground?

Two students are on a balcony 20.5 m above the street. One studentthrows a ball (ball 1) vertically downward at 12.4 m/s; at the sameinstant, the other student throws a ball (ball 2) vertically upwardat the same speed. The second ball just misses the balcony on theway down.
(a) What is the difference in the two ball's time in the air?
(b) What is the velocity of each ball as it strikes the ground?ball 1 magnitude 2 m/s
direction upward downward
ball 2 magnitude 4 m/s
direction upward downward

(c) How far apart are the balls 0.600 s after they arethrown?
6 m