Another question on motion?

Question

A van travelling at 10ms-1 accelerates at 4ms-2 for 5 seconds.

Calculate the final speed of the van.

i suck at science so this is hard to me lol

Answer 1

the formula for ur question is

    a = {v(final) - v (initial)} / time

so ..... 4 = {v (final) - 10}/5

          20 = v (final) - 10

       v (final) = 20+10

       v (final) = 30 m/s

Answer 2

30 m/s

Take the time it accelerated (5 seconds) and multiply it by the acceleration (2m/s^2). then add it to the initial velocity (10 m/s).

Answer 3

This is easiest if you just remember the equation.  When any of us answerers looks at your question, the first thing that pops into our minds is the general equation:

Vf = Vi + (a x t).

Vf  is the final speed

Vi  is the initial speed

a   is the acceleration

t    is the time

Make sure you have consistent units (like all seconds, instead of a mix of minutes and hours), plug into the equation, and you're good to go!

Vf = Vi + (a x t).

Vf = 10 m/s + (4 m/s² x 5 s).

Vf = 10 m/s + 20 m/s

Vf = 30 m/s