Question

بے

It is a net force of
7n was constantly
applied on 400 g object at rest
how long will it take to raise
it velocity to 8 meter per second
​

Answer 1

Answer:

If a body is moving with constant velocity, acceleration is zero. So net force acting on it will be also zero. But the body has energy due to its constant motion. Take the case of a freely falling body: it reaches its terminal velocity (120mph) when gravity = air resistance (drag).

Answer 2

Answer:

We can first find the acceleration as we know the force and mass

Also we know u=0 and v= 80m/s

So, by applying eq of motion

V = u + at

We can find "t" which will come out to be 4.5 s