Question #fe2cf

1 Answer
Gió
Jul 2, 2015

The equation of motion in this case is:
#s=vt+10#

Explanation:

If I got it correctly you have the following:
enter image source here
The equation of motion should be #s=vt# where #s# is the distance and #v# is the velocity (no acceleration involved); but here you have to consider the initial position not at zero but at #10m# (when you start your stopwatch the car is at the #10m# mark!)) so you get:
#color(red)(s=vt+10)#

At #t=0# your car is already at #s(0)=10m# while at #t=8s# your car is at #s(8)=vt+10=5*8+10=50m#.

Hope it is not confusing!

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