asteringPhysics: HW Ch. 3 Google Chrome Secure https://session.masteringphysics.

Question

asteringPhysics: HW Ch. 3 Google Chrome Secure https://session.masteringphysics.com/myct/itemView?assignmentProblemID-83594231 HW3-Ch Exercise 3.4 Exercise 3.4 A5.57, how ter is the squirrel from its inital position? Express your answer to three significant figures and include the appropriate units Ihe postion of a squimel running in a park is gen (0.0190 ej 4.96 Submit Incorrect: Try Again; 4 attempts remaining Part D Al5.57 s, wa is Ihe agilue of the squirtels veluily? Express your answer to three significant figures and include the approprlate units alueUnits Submit My Answers UR Part E At 557, what is the dirertian (in degrees counterclocwisc frem x-xis) of the squirels vcoaty Express your answer to three significant figures and include the appropriate units 0- Value Unils 9:56 PM lype here to search 2 10/6/2017 6

Explanation / Answer

here,

r = ( 0.28 t + 0.036 t^2) i + 0.019 t^3 j   ....(1)

C)

at t = 5.57 s

r = ( 0.28 5.57 + 0.036 * 5.57^2) i + 0.019 * 5.57^3 j

r = 2.68 i + 3.28 j m

the distance from initial position , |r| = sqrt(2.68^2 + 3.28^2)

|r| = 4.23 m

D)

differentiating the equation for v

v = dr/dt = ( 0.28 + 0.072 t) i + 0.057 * t^2 j

at t = 5.57 s

v = 0.68 i m/s + 1.77 j m/s

magnitude of velocity , |v| = sqrt(0.68^2 + 1.77^2)

|v| = 1.89 m/s

E)

direction , theta = arctan(1.77 /0.68)

theta = 69 degree from +x axis

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

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