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# Is a force needed to keep a puck moving on a frictionless surface?

Updated: 8/10/2023 Wiki User

12y ago

Enough to go against the air friction, which is usually negligible. If it is, just a very small force would be needed and it will continue in a straight line forever, until an unbalanced force acts upon it (e.x. it hits something). Wiki User

10y ago   Wiki User

14y ago

the puck would go on sliding at the same speed and in the same direction until it hits something or some external force applies to it. If there is no friction (from air or anything) and no force apply to it other than gravity (which is perpendicular to the plan of the pucks movement and counteracted by the surface resistance) then there is no reason why the puck would stop, accelerate or slow down or deviate from its trajectory.   Wiki User

9y ago

An object moving at constant velocity ... meaning at a constant speed in a straight line ... has
zero net force acting on it. That means that if there is any force acting on it, then there must be
one or more other forces, all adding up to zero.

Not only does it not require any force to keep an object moving with constant velocity, if there is
any net force acting on it, then its velocity can't remain constant.   Wiki User

12y ago

No, if there is no friction, then the puck would remain at a constant speed with no forces acting upon it.   Earn +20 pts
Q: Is a force needed to keep a puck moving on a frictionless surface?
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Still have questions?  Related questions

### What does the coefficient of static friction represent?

In free space or on a frictionless surface, it takes no force to move something. Where there is friction, the ratio of (force necessary to start it moving horizontally)/(the object's weight) is the coefficient of static friction on the horizontal surface.

force?

### What will happen if you apply a force on top of a disk kept on a frictionless surface?

The disc will slow down as a result of the friction applied by the force.

### Will a skateboard go faster if you push it with the same force for a longer time?

Yes. The force is measured as "acceleration" and is meters per second per second (or velocity per second) or the first derivative of velocity. On a frictionless surface in an environment without air resistance, and if the skateboard is a frictionless mechanism, if the skateboard is moving at a constant velocity, that means the acceleration is zero, which means that there is no force being applied to it and it is a body in motion staying in motion.

### What is needed to change the direction of a moving mass?

The answer is force because Force is needed to change the direction of a moving mass.

### Three blocks that are connected by massless strings are pulled along a frictionless surface by a horizontal force?

Well it's obviously not flying.

### What force that opposes motion when moving objects over a surface is called?

The force that opposes motion when moving objects over a surface is called friction

### What is the force that opposes motion when moving objects over a surface called?

The force that opposes motion when moving objects over a surface is called friction

yes it is

### If a cart is observed moving at a constant velocity along a horizontal frictionless track is there a constant net force acting on it in the direction of motion?

No force is acting on it. Constant velocity means no acceleration, which means no force, from f=ma, no 'a' no force.

### How does moving fulcrum on a lever change the amount of force needed to move an object?

how does moving a fulcrum on a lever change the amount of force needed to move an object

### When a block is moved on a surface there is an equal and opposite force acting on it - Newton's Third law- therefore the net force is zero the how does the block moves?

-- The equal and opposite forces on it are the vertical forces ... the weight of the block downward and the normal, constraint force of the surface upward. Since the vertical forces are equal and opposite, the net vertical force on the object is zero, and it has no vertical acceleration. -- Nobody ever said that the block needs force to keep moving. In fact, it doesn't. Once it's moving horizontally, no force is needed to keep it moving horizontally. If it weren't for that pesky friction where it touches the surface, it would keep moving forever with no force on it.