Question 5 if you launch a projectile from the origin, the trajectory of the projectile is a downward-pointing parabola. a. write the function y(x) for this parabola using the equations of motion in terms of vix and viy without using sine and cosine and, of course, g. this is also an equations of motion; one that does not explicitly contain the time and in two dimensions. this is the standard form for a parabola. y=-m(x - h)^2 + k b. find the vertex of the parabola (h, k). what is scale factor m? c. re-write the function y(x) in this form. d. repeat question 4 using the standard form of the parabola.

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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

false

explanation:

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