10. Consider two vehicles of different mass, traveling with the same constant ve

Question

10. Consider two vehicles of different mass, traveling with the same constant velocity. Suddenly, a cow steps in to the middle of the road some 40m ahead of the vehicles. Both drivers press on the brakes at the same time until they lock and the vehicles begin sliding t1 What would be the probable outcome (s) of this situation? a. The truck will hit the cow first. b. The car will hit the cow first. c. Both vehicles will hit the cow at the same time. d. This condition can be explained by Newton's 3rd law e. Both vehicles will stop on time at the same distance from the cow

Explanation / Answer

f = uk N = uk m g

and a = - f / m = - uk g

t = v0/ a = v0 / uk g

d = v0^2 / 2 uk g

d = v0^2 / (2 x 0.8 x 9.8) = v0^2 / 15.68

value of initial speed (v0) is not given.

so put value of v0 in m/s and get d in meters.

if d is less than 40 then option will be  

Ans: (e)  

if d is more than 40 then answer will be (c)

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

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