If a car accelerates uniformly from rest at 3.2m/s(2). when the car has traveled a distance of 40. meters, its speed will be.
I tried to use equation
v-u/a= t
but there r two unknowns in this
t and v...
how to solve it
If a car accelerates uniformly from rest at 3.2m/s(2). when the car has traveled a distance of 40. meters, its speed will be.
I tried to use equation
v-u/a= t
but there r two unknowns in this
t and v...
how to solve it
You're expected to be familiar with the uniform acceleration straightline motion formulae. I sugest you go back to your class notes or textbook and review this topic more thoroughly.
For the question you posted, use $\displaystyle 2as = v^2 - u^2$, substitute the given data and solve for v.
No, it is not because the formula v= S/t applies only to constant velocities.
Rather, use v= at and [/tex]S= (1/2)at^2[/tex]. (Since the car started from rest, your "u" is 0.)
In this problem, those equations become v= 3.2t and $\displaystyle 40= 1.6t^2$. Solve the second equation for t and put that into the first equation.