Annotating Competing Designs • Closely examine and annotate each design to record your observations and questions.
Note the ways that the designs are different and record your ideas about how the
differences will affect the speed of the roller coaster car.
Think about the key concepts you learned while investigating the spacecraft problem,
which are posted on the classroom wall.
.
After you have considered and annotated each design, discuss the following question with your
partner
Which design do you think will launch the roller coaster car the fastest?

answer; ///i believe that the correct answer is (45*) at a 45 degree check first good

scientific laws are the result of testing theories and proving them to be facts.

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s