39. ( A stone is dropped from the top of a cliff. It is seen to hit the ground b

Question

39. ( A stone is dropped from the top of a cliff. It is seen to hit the ground below after 355 s. How 40. Estimate (a) how long it took King Kong to fall straight down from the top of the Empire State 41. A ball player catches a ball 3.4 s after throwing it vertically upward. With what speed did he 42. A baseball is hit almost straight up into the air with a speed of 25 m/s. Estimate (a) how high it high is the cliff? Building (380 m high), and (b) his velocity just before "landing. throw it, and what height did it reach? goes, (b) how long it is in the air. (c) What factors make this an estimate?

Explanation / Answer

39.(i)

given

t = 3.55 s

u = 0 (initial velocity)

h = u*t + 1/2*a*t2

h = 0 +0.5*9.8*(3.55)2

h = 61.75 m

Related Questions

Navigate

• Browse (All)
• Browse 3
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.