What is the final speed of an object that starts from rest and accelerates uniformly at 4.0 meters per second2 over a distance of 8.0 meters? 1. 8.0 m/s 2. 16 m/s 3. 32 m/s 4. 64 m/s
Considering that the acceleration is uniform [tex]a=4 (m/s^2)[/tex] we apply the equation [tex]v^2=v0^2+2as[/tex] with zero initial speed [tex]v^2=2as[/tex] and we obtain the speed [tex]v^2 =2*8*4 =64 (m/s)^2[/tex] Thus [tex]v=8 (m/s)[/tex]
