Question

a ball of mass 20kg is rolling with 10m/s on applying a force after 2second it was observed to be rolling with 20m/s calculated the magnitude of the force​

Answer 1

Explanation:

We have,

Mass of ball = 20 g = 0.02 kg

Intial velocity = 10 m/s

Time taken = 2 sec

Final velocity = 20 m/s

We know that,

Force = Mass × Accleration

We already have the mass but we need to find the accleration let us find it;

According to the 1st equation of motion,

v = u + at

= 20 = 10 + 2a

= 20 - 10 = 2a

= 10/2 = a

= 5 m/s-² = a

Now, put acceleration as 5,in the formula of force:

= F = ma

= F = 0.02 × 5

= F = 0.10

= F = 0.1 N

Therefore, the total force applied will be 0.1 N