Question

A force F = 20 N acts on a object and
displaces it from rest to speed of
10 m/s in its direction. What is displacement,
if mass of object is 2 kg?​

Answer 1

Answer:

F = 20 N

v=10 m/s

s = ?

m = 2 kg

Explanation:

as we know

Force = mass × acceleration

20 = 2 × Acceleration

acceleration = 20/2 = 10 m/s²

now we have,

acceleration = velocity/ time

10 = 10/time

time = 10/10 = 1 s

now we have ,

velocity= displacement/ time

10= displacement/ 1

displacement (s) = 10×1 = 10 m

Answer 2

Answer:

The correct answer will be -

The displacement of the object will be 5 m.

Explanation:

Given in the question -

Force F = 20 N

Mass m = 2 Kg

Final Velocity v = 10 m/s

Initial velocity u = 0

We know that The force is given y the relation

F = ma

Then acceleration will be -

$20 = 2\times a\\\\a= 10\ m/s^2$

Now we know the acceleration we can find the displacement by -

$v^2 = u^2+2as\\\\10^2 = 0 + 2\times 10\times s\\\\s = \frac{100}{20} \\\\s= 5\ m$

The displacement of the object will be 5 m.

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