Motion Question

[chaput]

Hi there, could someone please help me out with the questions below:

A skier, starting from rest, accelerates at a constant rate down a flat (i.e. no bumps) slope in
a straight line.

a. It takes the skier 6 s to travel 108 m. What is the skier’s average acceleration in ms-2?

b. How fast is the skier going at this time (i.e. 6 seconds after starting)?


THANK YOUUUU HELP IS ALWAYS APPRECIATED:)

[Yertle the Turtle]

Hi there, could someone please help me out with the questions below:

A skier, starting from rest, accelerates at a constant rate down a flat (i.e. no bumps) slope in
a straight line.

a. It takes the skier 6 s to travel 108 m. What is the skier’s average acceleration in ms-2?

b. How fast is the skier going at this time (i.e. 6 seconds after starting)?


THANK YOUUUU HELP IS ALWAYS APPRECIATED:)

You would simply use the motion equations since you know time (6s), initial velocity (0m/s) and displacement (108m):
a) s=ut+1/2at^2
=>a=(2(s-ut))/t^2
=>a=(2*108)/36=6m/s^2

b) s=1/2(v+u)t
=>v=(2s/t)-u
=>v=36m/s