Help with Physics Equation?

Question

Calculate the instantaneous speed (in m/s) at the 10 second mark for a car that accelerates at 2m/s^2 from a position of rest.

Can someone help me through this problem?

Answer 1

what you have wrote is Not even a formula sorry to be harsh... here is what you need to do first find the distance it travels in 10 sec. we know that starting point is at 0 b/c it says its initial position is at rest.

now to find the final distance(xfinal)

x=v(initial)t+ .5at^2

x=0+.5(2m/s^2)(10s^2)

x=100m

we know x(initial),v(initial),t(initial)=0

Delta means final - initial

now to find instantaneous speed = delta x / delta time

100-0m/10-0s = 10m/s

Answer 2

vf = v0 + at = 0 + (2 m/s^2) (10 s) = ...