A sprinter explodes out of the starting block with an acceleration of +3.5 m/s 2

Question

A sprinter explodes out of the starting block with an acceleration of +3.5 m/s2, which she sustains for 1.2 s. Then, her acceleration drops to zero for the rest of the race.

-2 points CJ10 2-P018. A sprinter explodes out of the starting block with an acceleration of +3.5 m/s which she sustains for 1.2 s. Then, her acceleration drops to zero for the rest of the race. (a) What is her velocity a t 1.2 s, m/s (b) What is her velucity al the end of the race? m/s Additional Materials section 2.3 Submit Answer Save Progress Pratce Another version My Notes Ask Your Teacher

Explanation / Answer

a) use, v = u + a*t

= 0 + 3.5*1.2

= 4.2 m/s

b) After 1.2 s the sprinter moves with constant velocity.

so, velocity at the end of the race = 4.2 m/s

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

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