A car starts from rest and travels for J, seconds Z. a uniform acceleration The

Question

A car starts from rest and travels for J, seconds Z. a uniform acceleration The dr.ver then apes the brakes, causing a uniform acceleration a2. H brakes are applied for L, seconds, (a) how fast is the car going just before the beginning of the braking period.-' (b) How far does the car go before the driver begins to brake? (c) Using the answers to parts (a) and (b) as the initial velocity and position for the motion of the car during braking, wilt total distance does the car travel? Answers are in terms the variables and t2.

Explanation / Answer

then acclearation a = 686.7/(6*10^24) = 1.14*10^-22 m/s^2

time taken = t = t1

aceelaration before breaks apply = a1

initial velocity is u = 0 m/s

then answer for a) is v = u+(a1*t1) = 0+(a1*t1) = a1*t1

B) S = (u*t)+(0.5*a*t^2) = (0.5*a1*t1^2)

C) total distance travelled is S_total = S+(vt)-(0.5*a2*t2^2) = (0.5*a1*t1^2)+(a1*t1*t2)-(0.5*a2*t2^2)

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

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