We saw in Newton's laws of motion that if we apply an external unbalanced force on a ball,it will move and also will come to a stop because of gravitational pull and also frictional force. If we do the same thing in space,will the ball come to a stop?

Because,in space there is no frictional force and no gravitational pull,so will it come to stop?

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Solution

Suppose you are throwing a ball in space,

The instant the ball leaves your hand it's speed will become constant since your hand is no longer accelerating it. The object will maintain the speed until it encounters a solid object or an atmosphere.

So the ball will continue it's motion since there are no external constraints as you have mentioned.The motion is not accelerated.

But there are chances of the ball slowing down when it encounters another space object or similar substances. The magnitude and direction of velocity may change when the ball enters the gravitational field of other planets etc.

If there are absolutely no constraints, then the ball will continue it's motion and it won't stop.

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