Window Help 11% ) Fri 3:00 PM Amanda Bray session.masteringphysics.com e.) C a s

Question

Window Help 11% ) Fri 3:00 PM Amanda Bray session.masteringphysics.com e.) C a session.masteringphysics.com HWCh8 Problem 8.21 - Enhanced - with Feedback Rasources previous 7 of9ney Problem 8.21 Enhanced - with Feedback Part A At an amusement park, a swimmer uses a water slide to enter the main pool. You may want to review pages 234-24 1) If the swimmer starts at rest, slides without friction, and descends through a vertical height of 2.56 m, what is her speed at the bottom of the slide? Submit My Answers Give Up Provide Feedback Contin

Explanation / Answer

Use conservation of energy,

at the highest point, Total Energy = Potential Energy = mgh

near the pool, Total Energy = Kinetic Energy = (1/2)mv2

equate the two

mgh = (1/2)mv2

=> v = [2gh]1/2 = [2 x 9.8 x 2.56]1/2 = 7.083 m/s.

This is the swimmer's speed at the bottom of the slide.

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

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