An ice sled powered by a rocket engine starts from rest on a large frozen lake and accelerates at 12.8 m/s2 . at t1 the rocket engine is shut down and the sled moves with constant velocity v for another t2 s. the total distance traveled by the sled is 5.37 × 103 m and the total time is 97.7 s. find t1.

4.39 s

Explanation:

Given

initial velocity

acceleration

velocity acquired by sled in time

distance traveled by sled in

distance traveled in time with velocity

----1

substitute the value of in 1

we get

thus

graphing motion: mastery test

209be

what is the instantaneous acceleration of

the particle at point b?

0 meters/second?

10 meters/second?

12 meters/second?

velocity imetersisecond

15 meters/second?

20

time (seconds)

answer: 0 meters/second^2

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle