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What is an example in which a force is exerted on an object without doing work on the object?
Pushing against a stationary wall is an example where a force is exerted on the wall, but no work is done on the wall since it does not move. Work is only done when a force causes an object to move over a distance in the direction of the force.
Explain - how you can exert a large force on an object without doing any work?
You can exert a large force on an object without doing any work by pushing against an immovable wall. In this scenario, although a large force is applied, no work is done because there is no displacement of the object in the direction of the force. Work is only done when there is both a force and displacement in the same direction.
Can there be force without movement?
Yes, force can exist without movement. An example of this is when an object is held stationary against a wall with a force acting on it. The object is not moving, but there is still a force exerted to keep it in place.
When is work said to be done against the force of gravity?
All bodies with mass are attracted to the Earth by gravity, so when a body is raised you must do work to raise it. This work is equal to force x height, if force is in Newtons and height in meters, the work is in units of Joules.
IS THERE work can be done without any force?
No, work cannot be done without any force being applied. In physics, work is defined as the product of the force applied to an object and the distance over which the force is applied. Therefore, without force, there is no work being done on an object.
When you say work is done against a force you mean the force does?
Negative work
What is an example in which a force is exerted on an object without doing work on the object?
Pushing against a stationary wall is an example where a force is exerted on the wall, but no work is done on the wall since it does not move. Work is only done when a force causes an object to move over a distance in the direction of the force.
Explain - how you can exert a large force on an object without doing any work?
You can exert a large force on an object without doing any work by pushing against an immovable wall. In this scenario, although a large force is applied, no work is done because there is no displacement of the object in the direction of the force. Work is only done when there is both a force and displacement in the same direction.
Can there be force without movement?
Yes, force can exist without movement. An example of this is when an object is held stationary against a wall with a force acting on it. The object is not moving, but there is still a force exerted to keep it in place.
When is work said to be done against the force of gravity?
All bodies with mass are attracted to the Earth by gravity, so when a body is raised you must do work to raise it. This work is equal to force x height, if force is in Newtons and height in meters, the work is in units of Joules.
IS THERE work can be done without any force?
No, work cannot be done without any force being applied. In physics, work is defined as the product of the force applied to an object and the distance over which the force is applied. Therefore, without force, there is no work being done on an object.
Work done against gravity work done against friction?
The work done against gravity is given by the force applied multiplied by the vertical distance lifted. The work done against friction is given by the force applied multiplied by the horizontal distance over which the object moves against the force of friction. Both types of work involve overcoming resistive forces to move an object.
What is the work done when a force of 20N moves a book 3.5M what is the potential energy?
The idea is to multiply force times distance. This assumes that both are in the same direction, and that the force is constant. If the force is done against a gravitational field, or some other so-called "conservative force", then all the work done will be converted to potential energy. If it is done against friction, the work is basically wasted. It is converted to heat, and NOT to potential energy.
What is the work done against the gravity when a body is moved horizontally along a frictionless surface?
No work is done against gravity when a body is moved horizontally along a frictionless surface because the force of gravity acts perpendicular to the direction of motion. Work is only done when a force is exerted in the direction of motion.
Which of the following does not require work to be done An increase in?
An increase in temperature does not require work to be done because it is a spontaneous process driven by the thermal energy of the system. Work is only required if we want to decrease the temperature or maintain a lower temperature against a natural increase.
How work done against gravitational force?
Lift any object. Grav. force is acting down, you must apply an upward force to lift the object. Work is force applied through a distance, so work is done if you lift it, but not if you hold it still.
What is work done by a coolie walking on a horizontal platform with a load on his head?
The work done by the coolie is zero because the force he exerts is in the vertical direction (lifting the load against gravity) while the displacement is in the horizontal direction. Work is only done when the force and displacement are in the same direction.
