Question

the speed of a body starting from rest is increasing at a constant speed of 4 metre per second does its acceleration of its be zero​

Answer 1

Given initial speed of the body = 0 m/s (as the body is at rest)

Now according to question,

The body increases its speed at a constant rate of 4 m/s .

Thus we know acceleration

a = (Final 'v' - initial velocity 'u' )/Time(t)

Now when time interval t = 1 second,

acceleration a = (4-0)/1 = 4 m/s²

At t = 2 s ; final velocity will be 8 m/s

a = (8-0)/2 = 4 m/s²

At = 3 s ; final velocity = 12 m/s

a = (12-0)/3 = 4 m/s²

And so on,

Thus we can say that the body accelerates at a rate of 4 m/s².