Asked by Nancy
Brett stats from rest on his skateboard and accelerates at 0.5 m/s2 [N] for 12s, and then maintains his velocity for 15s before falling off his board. He slides along on his back until he comes to rest, accelerating at -2.4 m/s2.
a) Calculate the highest instantaneous velocity that Brett reaches.
b) How long did it take Brett to come to rest after falling?
c) Draw a velocity-time graph for the total time.
d) What is his displacement in the first 12s?
e) What is his displacement while maintaining a constant velocity?
f) What is his displacement after he fell?
g) What is Brett’s average velocity over the total time?
a) Calculate the highest instantaneous velocity that Brett reaches.
b) How long did it take Brett to come to rest after falling?
c) Draw a velocity-time graph for the total time.
d) What is his displacement in the first 12s?
e) What is his displacement while maintaining a constant velocity?
f) What is his displacement after he fell?
g) What is Brett’s average velocity over the total time?
Answers
Answered by
Chanz
a) v = at
b) t = v/a
d) x = 1/2 at^2
e)x = vt
f) x = 1/2at^2
g) v = total dist/total time
b) t = v/a
d) x = 1/2 at^2
e)x = vt
f) x = 1/2at^2
g) v = total dist/total time
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