- #1

- 9

- 0

2.A speedboat starts from rest and accelerates at 2.01m/s^2 for 7.00 sec. At the end of this time, the boat conts. for an additional 6.00sec. with an acceleration of 0.518m/s^2 . Following this, the boat accelerates at - 1.49m/s^2 for 8.00 sec. (a) what is the velocity of the boat at t=21.0sec. (b) find the total displacement of the boat

** i don't know where to start cuz there so many A and V.

3. A Boeing 747 " Jumbo Jet" has a length of 59.7 m. The runway on which the plane lands intersects another runway. The width of the intersection is 25.0 m. The plane decelerates through the intersection at a rate of 5.70m/s62 and clears it with a final speed of 45.0m/s. How much time is needed for the plane to clear the intersection??

out of 20 probs..that's theonly 3 i don't understand so anyone can help i'll greatly appreciated.. thanks in advanced