i3. O 0.66 0.66 points I Previous Answers sero A train 40o m long is moving on a

Question

i3. O 0.66 0.66 points I Previous Answers sero A train 40o m long is moving on a straight track with a speed of km/h. The neer applies the brakes at a crossing, and later the last car passes the crossin with a speed of 15.7 km/h. Assuming constant a determine how long the train blocked the Disregard the width of the Need Help? tea 14, O 66 points I Previous Answers SerCP9 2PO47 soln free eased from rest D trave Find the veloc Xove the ground The response You submitted has the w mls Find the total distance the ob he fa Your response is within 10% of the correct value. This may be due to roundof error, or esults to at least four nimize roundoff error. Need Help? Talk to a Tutor Submit Answer ave Progress Practice Another Version Previous Answers SerCP9 2 P 054 WI 0.760.76 points A baseball is hit so it travels straight upward after being struck by the bat. A fan observes that it takes 2.90 s for the ball to reach its maximum height. that (a) Find the ball's initial velocity. m/s upward 28 42 (b) Find the height it reaches. m 41.22

Explanation / Answer

s =ut+1/2*g*t^2

36.5 = u*1.75+5*1.75^2

u=12.107 m/sec

now this is V

12.107 = gt

t= 2.421 sec

therefore total distance = 1/2*10*(2.421+1.75)^2=86.98m

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

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