a 10kg box initially at rest is pulled 18 meters accros horizontal, frictionless sutface by a 40 n what is the block's final vel

Question

3 years ago

13

ocity over the 18 meters?

1 answer:

Gelneren [198K] · Answer 1 · 2022-04-12T12:57:16+03:00

<h2>Answer</h2>

Final Velocity = 144 m/s

<h2>Explanation</h2>

Given that,

<em>distance the box travelled = 18m</em>

<em>initial speed = 0 m/s</em>

<em>Force = 40N</em>

<em />

Force = mass x acceleration

40N = 10 x acceleration

acceleration = 40/10

acceleration = 4m/s²

<h3> Formula for final speed </h3><h2> v - u = 2 as</h2>

<em>where u = initial velocity</em>

<em> v = final velocity</em>

<em> a = acceleration</em>

<em> s = distance</em>

v - 0 = 2(4)(18)

v = 2(4)(18)

v = 144 m/s

So the block's final velocity = 144m/s