1.

A 0.2 kg object at rest is subjected to a force 0.3i-0.4j Newton what will be velocity after 6 sec

Answer»

Force = MASS × Acceleration

Given that the force is in vector form we can write it in form of COLUMN vector.

After this we can substitute the values of force and mass to get acceleration from this.

Knowing that acceleration = change in VELOCITY ÷ time

We can then get the final velocity from this formula.

The velocity and the acceleration will be in vector form.

Find the calculations in the images below.

From the images we can see that the the final velocity is :

9I - 12j



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