zero! If "free space" is free of forces then the force required to maintain a body at constant speed is zero, because a body at constant speed and direction has zero acceleration and whatever the mass m, f=ma and if acceleration a is zero the force is zero.It takes force to change speed or direction. A body moving around in a circle at constant speed is still changing direction and accelerating and requires force, even if the speed is constant. So you could push the body up to 15 miles per hour and then let go and it would take zero force for the body to maintain 15 miles per hour speed. If you whirled the body on a string up to 15 miles per hour and cut the string , the body would take off in the direction tangent to when the string was cut and go in that direction at 15 miles per hour and it would take zero force to maintain that speed.
In outer space, there is no air resistance, so once the rocket ship is moving at a constant vevocity, no more force is needed to maintain that velocity.
Zero force is required to maintain the speed.
the force required to stop
Zero
zero
Zero
Zero.
Newton's 1st Law of Motion states that an object will maintain its speed when there is no net force acting on it. The question refers to free space and constant velocity -- the net force has to be zero. =========================
It can, but it won't always. In other words, if the speed is constant, the velocity may, or may not, be constant as well.
No. An object traveling at a constant velocity is not accelerating.
In order to change the direction of the velocity, acceleration is absolutely required. And as long as you've got it, there's no reason why it can't be constant. An object moving in a circle at a constant speed ... like a TV satellite ... has constant acceleration, and the direction of its velocity is constantly changing.
Moving at constant velocity doesn't require any force, regardless of the object's mass or where it is.
Newton's 1st Law of Motion states that an object will maintain its speed when there is no net force acting on it. The question refers to free space and constant velocity -- the net force has to be zero. =========================
It can, but it won't always. In other words, if the speed is constant, the velocity may, or may not, be constant as well.
Newton 2nd Law is the answer
No. An object traveling at a constant velocity is not accelerating.
In order to change the direction of the velocity, acceleration is absolutely required. And as long as you've got it, there's no reason why it can't be constant. An object moving in a circle at a constant speed ... like a TV satellite ... has constant acceleration, and the direction of its velocity is constantly changing.
Newton's 1st Law
Yes. An object moving in a straight line at constant speed has constant velocity.
Velocity can change even if speed is constant.
Moving at constant velocity doesn't require any force, regardless of the object's mass or where it is.
No. If the forces on an object are unbalanced, that means their sum is not zero, and there is a net force on the object. Since there is a net force on it, the object is accelerated, which is another way of saying that its velocity changes.
Newton's 1st law'
It depends where the space craft is. If it is in deep space far away from any large mass (like a planet, star, etc) then the answer is no. If it is close to a mass then the answer is yes. An equal and opposite force is required to balance the gravitational force to keep it moving in a straight line.