Question

how the answer is 4 classify answer please

agar answer aata hain toh de nehi aata toh I dont know na likhe ​

Answer 1

Answer:

To keep the momentum constent

Answer 2

According to law of inertia or Newton's first law of motion, a body in state of rest or of uniform motion remains in state of rest or of uniform motion unless it is acted upon by an external force. Hence a body in uniform motion required no force to keep them in uniform motion.

Given that force = mass x acceleration

Constant speed means there is no acceleration, therefore if acceleration = 0 force is also 0.

So a force is not necessary to maintain constant speed, assuming no friction.

In deep space, for example, objects will zoom along at a constant speed with no force on them whatsoever. That results from Newton's First law of motion, which states a body in motion tends to stay in motion unless acted on by a net force.

But in most cases, when v = constant and it requires a force F to maintain that constant speed, it's because there is a braking force of friction or air drag trying to stop the body from moving. And that's why a push or pull is necessary to maintain a constant speed, to offset those braking forces.

its the answer....