Question

A body moves with constant velocity of 20 m/s. The mass of body is 2 kg. The unbalanced force acting on the body is _____________

Answer 1

Answer :

• Net Force = 0

Explanation :

Since , the body is moving with constant velocity of 20 m/s , the change in velocity is 0 .

• Acceleration = Change in velocity / time

Acceleration = 0

Since , the acceleration is 0 , the force will also be 0 .

From Newton's second law of motion :

F = m a

F = 2 × 0

• F = 0

Therefore the net force acting would be 0 .

Also , from Newton's first law of motion , a body will be in its position of rest or uniform motion until and unless an external force is applied to it .

Here , the body is in uniform motion , so no external force is applied to it . Hence , the net force on the body is 0 .

Answer 2

Answer:

0 Newtown

Explanation:

force = mass×acceleration

v = 20m/s (constant)

so acceleration = 0

mass = 2 kg

f=ma

f = 2 × 0

f = 0 Newtown