A car starts from rest and travels a distance of 150 m in 15 s with a constant acceleration what is the velocity of the car after 15 s?

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(1) Answers

Courtneymcgee30

here, we have
d = 150m, t = 15s, V0 = zero, acc. is constant
he wants Vf (final velocity) after 15s
we will use to 2 equations from the kinametics equation
the first one to get the acc. which is d= v0*t+0.5*a*t^2
v0=zero then d= 0.5*a*t^2
then a= 2*d/(t^2) = 4/3 m/s^2
we have the acceleration now so we can get the V through this Equation
V=v0+a*t
0+ 4/3 * 15= 20 m/s