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An object of mass 'm' is moving with the constant velocity 'v' how much work should be done on the object to bring it to rest?
Wiki User
∙ 14y ago
An object with mass 'm' moving with velocity 'V' has kinetic energy of [ 1/2 m V2 ] .
In order to bring it to rest, its velocity has to be reduced to zero, and in order to
accomplish that, the kinetic energy has to be drained off and sent somewhere else.
An external force has to absorb energy from the object, i.e. do negative work on it,
equal to its kinetic energy, or
- 1/2 m V2
Wiki User
∙ 14y ago
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What are the condition for an object to stay at rest to keep moving at constant velocity?
The condition for an object to stay at rest or if moving, moving at a constant velocity is that the sum of forces acting on the object be zero or that no force acts on the object.
Is the force required to keep a rocket ship moving at a constant velocity in deep space equal to the ship's weight?
No. Without friction or air resistance, no force is required to keep an object moving at a constant velocity. Also, by the way, just thought we should mention: In deep space, the ship has no weight.
How do you calculate the velocity of a moving object from two points on a position time graph?
First, note that velocity is a vector quantity. This means it has a magnitude (the speed) as well as a direction. The magnitude of the velocity is the difference in position divided by difference in time. Hopefully, the direction should be evident from the graph.
How do you find out if a force is balanced or unbalanced?
Its easy....To balance force you need to apply an equivalent force in the opposite direction....Example:If a force of 20N acts on a body along the North, you should apply 20N along the south......simple.......
Would you hear a change in pitch if you are on a moving train and the train whistle blows?
Since you are also on the moving train, the pitch should remain constant.
What are decondition for an object to stay addresto keep moving constant velocity or remove constant velocity?
If the sum of all forces on an object is zero, then the object remains in constant, uniform motion. 'Constant uniform motion' means motion in a straight line at a constant speed. The physical description of such motion is "constant velocity". "Rest" is just constant velocity with a speed of zero. If the sum of all forces on an object is NOT zero, then the object's velocity must change. The change may consist of speeding up, slowing down, or turning in a different direction. Note: If you can, you should try and find the question in writing, so you can see what it's really asking.
What are the condition for an object to stay at rest to keep moving at constant velocity?
The condition for an object to stay at rest or if moving, moving at a constant velocity is that the sum of forces acting on the object be zero or that no force acts on the object.
What are the conditons for an object to stay at rest to keep moving at constant velocity or to move with increasing velocity?
When the object is at rest, the acceleration is zero. so the net total force acting on the body from all directions should be zero. when the object is moving with constant velocity, the acceleration is zero, so in this case too, after the motion is started, the force on the body should be zero. when the velocity is increasing, some acceleration is present, so some force should be present in the direction of the motion. These are the various cases which can be explained by the equation: Force = Mass * Acceleration. here the mass remains constant, so acceleration depends on the net force/
Is the force required to keep a rocket ship moving at a constant velocity in deep space equal to the ship's weight?
No. Without friction or air resistance, no force is required to keep an object moving at a constant velocity. Also, by the way, just thought we should mention: In deep space, the ship has no weight.
The momentum of an object depends on what two forces?
The amount of momentum that an object has is dependent upon two variables: how much stuff is moving and how fast the stuff is moving. Momentum depends upon the variables mass and velocity. In terms of an equation, the momentum of an object is equal to the mass of the object times the velocity of the object.
How fast is the milky way galaxy's local cluster moving through the universe?
Compared to what reference point? A velocity of some object should always be indicated relative to some other object.
Measures an objects tendency to remain at rest or keep moving with constant velocity?
When the object is at rest, the acceleration is zero. so the net total force acting on the body from all directions should be zero. when the object is moving with constant velocity, the acceleration is zero, so in this case too, after the motion is started, the force on the body should be zero. when the velocity is increasing, some acceleration is present, so some force should be present in the direction of the motion. These are the various cases which can be explained by the equation: Force = Mass * Acceleration. here the mass remains constant, so acceleration depends on the net force
How do you calculate the velocity of a moving object from two points on a position time graph?
First, note that velocity is a vector quantity. This means it has a magnitude (the speed) as well as a direction. The magnitude of the velocity is the difference in position divided by difference in time. Hopefully, the direction should be evident from the graph.
How is it possible to be moving in one direction even though the unbalanced force is in the opposite direction?
Perhaps you are thinking that the velocity should be proportional to the force, or something like that. That's not the way it works. It is the acceleration, not the velocity, that is proportional to the force, but it may take a while to change the velocity. If an object is moving in one direction and there is a force in the opposite direction, it may simply take a while for the velocity to change enough, so that it also moves in the direction of the force. For example, if you throw an object upwards, once you let it go, basically the only force acting on the object is gravity - which basically pulls it downward. Depending on the object's speed, it may take a while for the object to "turn around".
How does adding and removing of force affect a moving object and an object at rest?
For an object in motion, a force applied in the direction of the movement of the object would propel it further along that direction. The force should be equal or more than the momentum of the object. If a force in applied against the moving object in a direction opposite to the movement of the object, the velocity of the moving object is hampered. How much this decrease in velocity would occur would depend on the amount of the opposing force. If a sufficiently large force in an opposing direction is applied, it can even stop the object. If the force is not along or opposite the movement of the object, the force can change the direction of the object. If the force that was causing the movement of the object is removed, the object slows down, until it finally stops. For an object at rest, a sufficient amount of force can set the object in motion.
What type of motion is occurring when the slope of a line is not zero?
Assuming the graph is for displacement versus time, the motion should be constant velocity. If velocity versus time motion is constant acceleration
How do you use a word constant in a sentence?
I wonder what is the constant speed of this moving car
