Question

A 400g mass object at rest is acted on by a 200 N net force for 12 seconds. What is it’s final velocity?

The answer is supposed to be 6000 m/s but I’m not sure how…

Answer 1

Step-by-step explanation:

do we can say that the first step is finding the acceleration of the object. We do so by saying F = ma

so a = F/m

a = 500 m/s^2

we now have the time, acceleration and initial velocity.

so we can find the final velocity by using one of newtons equations which is: vf = vi + at

so:

vf = 0 + 500 × 12

vf = 6000

note that our initial velocity was zero since the object was initially at rest.

if you still have any doubt dont hesitate to ask for further help.