@* 50%. 9:06 PM webassign.net .11 Sprint A golf ball is hit off a tee at the edg

Question

@* 50%. 9:06 PM webassign.net .11 Sprint A golf ball is hit off a tee at the edge of a cliff. Its x and y coordinates as functions of time are given by the following expressions. x = (19.0 m/s)t y = (4.80 m/s)t-(4.90 m/s2)t2 (a) Immediately after the golf ball is hit, in which of the following directions is the golf ball moving? (b) Write a vector expression for the ball's position as a function of time, using the unit vectors i and j. (Use the following as necessary: t.) m)i (c) By taking derivatives, obtain an expression for the velocity vectorv as a function of time. (Use the following as necessary: t.) m/s)i m/s)j (d) By taking derivatives, obtain an expression for the acceleration vector a as a function of time. (Use the following as necessary: t.) m/s2)i m/s2)j (e) Next use unit vector notation to write an expression for the position of the golf ball at t = 2.30 s. (f) Write an expression for the velocity at this time. y(2.30 s) = ( (g) Write an expression for the acceleration at this time. a(2.30 s) = ( Need Help?r

Explanation / Answer

a] 4th option is correct, because the slope should be 4.8/19

b] r = 19t i + (4.8t-4.9t^2) j

c] taking derivative, v = 19 i + (4.8 - 9.8t) j

d] taking derivative again, a = 0 i -9.8 j

Related Questions

Navigate

• Browse (All)
• Browse #
• Subjects

---

---

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