File Edit View History People Window Help Classes Northeast Commun 86264522 i Se

Question

File Edit View History People Window Help Classes Northeast Commun 86264522 i Secure https://session Ch.7 Eneray Problem 7.26 Express your answer to three signilficant figuros. Problem 7.26 8.52 m/s A 72 0 kg swimmer jumps into the old swimming hole from a tree limb that is 3.70 m above the water My Anewers Give Up Submit Correct Part B Use energy conservation to find his speed just as he hits the water i he b just beyond the boardl) at 2.30 m/s dy Express your answer to three significant figures. 9.28 m/s Submit My. Answers Give Up Incorrect; Try Again; 5 attempts remaining Part C Use energy conservation to find his speed just as he hits the water if he MacBook Pro

Explanation / Answer

b. Use energy conservation to find his speed just he hits the water if he bravely jumps straight up (but just beyond the board!) at 2.30m/s .

U =m*g*h.....potential energy

Eko = 1/2*m*Vo^2......initial kinetic energy

Ek = 1/2*m*V^2...final kinetic energy

equating them (m cross) :

V = Vo^2+2*g*h = 2.30^2+19.6*3.70 = 8.82 m/sec

c.Use energy conservation to find his speed just he hits the water if he manages to jump downward at 2.30m/s .

exactly the same calculated in b

i.e V = 8.82 m/s

.... what changes is just the time needed for reaching the water

Related Questions

Navigate

• Browse (All)
• Browse F
• Subjects

---

---

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