: 6/11/2016 11: PM End 6/11/2016 11:30:00 PM (14%) Problem 2: A car begins at re

Question

: 6/11/2016 11: PM End 6/11/2016 11:30:00 PM (14%) Problem 2: A car begins at rest at torO·The car starts moving and finally covers a distance d=899 m in a time t 114 s. In a coordinate system with north being the positive x-direction, the car's motion is in the southern direction (see figure). time, t o O what was the car's average speed during this period, inn etersper second? 25% Part (a) 25%Part (b), what was Pocential sinO cotanO asinO acosO atanO acotanOsinhO cosh tanhO cotanho ed ted Feedback SW

Explanation / Answer

14 ans

initial time to=0

finial time tf=114 s

initial distance X1=0

finial distance X2=899m

(a) ans

the average speed =X2-x1/[t2-t1]

=899-0/[114-0]

=7.89 m/s

(b) ans

the displacement X"=x2-x1=899-0=899 m

(c) ans

the average velocity =total displacement/total time=899-0/114-0

=7.89 m/s

(d) ans

finial velocity Vf=-30 m/s

initial velocity Vi=0

the average acceleration =Vf-Vi/tf-to

=-30-0/114-0

=-0.2632 m/s^2

Related Questions

Navigate

• Browse (All)
• Browse #
• Subjects

---

---

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