A tortoise and hare start from rest and have a race. As the race begins, both ac

Question

A tortoise and hare start from rest and have a race. As the race begins, both accelerate forward. The hare accelerates uniformly at a rate of 1.1 m/s2 for 4.1 seconds. It then continues at a constant speed for 13.4 seconds, before getting tired and slowing down with constant acceleration coming to rest 79.0 meters from where it started. The tortoise accelerates uniformly for the entire distance, finally catching the hare just as the hare comes to a stop. 1) How fast is the hare going 2.5 seconds after it starts? See solution m/s Your submissions: 2.75 Computed value: 2.75 Submitted: Wednesday, January 23 at 6:48 PM Feedback:Correct! 2) How fast is the hare going 14.2 seconds after it starts? See solution m/s Your submissions: 4.51 Computed value: 4.51 Submitted: Wednesday, January 23 at 6:50 PM Feedback:Correct! 3) How far does the hare travel before it begins to slow down? See solution m Your submissions: 69.7 Computed value: 69.7 Submitted: Wednesday, January 23 at 6:50 PM Feedback:Correct! 4) What is the acceleration of the hare once it begins to slow down? See solution m/s2 Your submissions: -0 Computed value: -0 Submitted: Wednesday, January 23 at 6:56 PM Feedback: 5) What is the total time the hare is moving? See solution s 6) What is the acceleration of the tortoise? See solution m/s2

Explanation / Answer

1)2.75 m/s 2)4.51 m/s 3)69.7 mtr 4) -1.09 m/s2 5)21.62 secs 6) 0.34 m/s2 5)hare takes 9.3 mtr to stop from a speed of 4.51 m/s. i.e 4.12 secs, now add all the time 4.1+13.4+4.12=21.62 secs 6)tortoise took same time as hare to cover the same distance,use 79=1/2*a*(21.62)^2 and take out the acceleration = 0.34 m/s^2

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

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