Question

Calculate the net force acting on a body of mass 10 kg moving with a uniform velocity of 2ms-1

Answer 1

Hey!

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Given,

Mass = 10 kg
Velocity = 2 m/s
Net force = ?

Net force will be 0 . This is because an object moving with a uniform speed has zero acceleration, there is no change in velocity.

And according to Newton's second law of motion, we know, Acceleration is directly proportional to Force.

If acceleration = 0
Force = Mass × Acceleration
Force = Mass × 0
Force = 0

Thus, Net force acting on the body is 0.

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Hope it helps...!!!

Answer 2

Hi,

Thats tricky!

Uniform velocity i.e NO CHANGE IN VELOCITY

Force = mass  * acceleration

Acceleration is  rate of change of velocity over time
Since the body is in uniform velocity Change in velocity = 0.
So acceleration will be 
      change in velocity 
=  -------------------------    =  0/time = 0
         Time

Acceleration is ZERO

So , we get FORCE = 0

So Net force acting on any body with uniform velocity is 0

ZERO.

Hope it helped!