If the displacement of the object is zero, then one can calculate the
work done by each individual force
, the work done by each force is zero. Why? Work is not defined in terms of what would have happened to the object in the absence of other forces; it is defined in terms of the motion that actually occurred.
What would be the work done if the displacement of an object is zero class 9?
Ans.
Work done by the force of gravity
on the object is zero. Force of gravity acts in the vertical downward direction and the distance covered the the tiobj of force, the horizontal direction. As there is no displacement in th hence the work done is zero.
What will be the value of work done if there is no displacement?
You can calculate the applied force pushing the mass one way, and the applied force pushing the mass the other way. Note that because there is no displacement, the value of the applied forces are equal. In conclusion, no work is done. … Thus the dot product F.S=0, i.e. work done is
zero
.
What would be the work done if a force on the object is zero B displacement of the object is zero?
The object moves in such a way that the point of application of the force remains fixed
(dx=0)
. …
When there is no displacement work done is equal to zero?
The correct answer is Displacement. The work done is
zero
if there is no displacement. Displacement is the change in position of an object, measuring from its starting and final position. Power is defined as the rate at which energy is transferred or work is done.
What is zero work done with example?
1) A simple example of zero work is
when you stand holding a bag in your hands and do not move it
. Your hands apply a force on the bag to balance the force of gravity exerted on it but since there is no displacement of the bag, the work done on it by you (your force) and also the gravity is zero.
What are the two conditions when work done is zero?
Two conditions when the work done is zero are:
(i) When there is no displacement (S=0)
and, (ii) When the displacement is normal to the direction of the force (θ=90o).
What would be the work done if a point charge?
Work done
is zero
, because on the circumference, distance between two charges remains the same.
What is one example of a resistant force?
Friction
and fluid resistance are resistive forces when the material is stationary. However, both can also contribute as an applied force when the materials or objects are moving relative to each other. For example, a boat moving through still water experiences the resistive force of water resistance.
What is the common formula for work?
Work can be calculated with the equation:
Work = Force × Distance
. The SI unit for work is the joule (J), or Newton • meter (N • m). One joule equals the amount of work that is done when 1 N of force moves an object over a distance of 1 m.
Can normal force on an object ever do work?
At the first-year physics level —
absolutely a normal force can do work
. If an object moves parallel (or antiparallel) to a normal force, then the normal force has done work. … The normal force is upward, movement is left, so the motion is not parallel to the normal force. No work is done by Fn.
When can we say work done on an object is zero?
Work done is zero
when the force is perpendicular to the displacement
. It can also be zero if either the force or the displacement are zero.
Is displacement possible without force?
Answer: Yes,
there can be displacement of an object
in the absence of any force acting on it. … The net force acting on it is zero. But, there is a displacement along with the motion of the object.
In which case is the work done zero?
Zero work is done when
the displacement of a body is zero or perpendicular (θ=900,cosθ=0) to the direction of force applied
, then work done is zero. For example, if a person tries to push a wall, he is applying force yet the wall does not move, so the displacement of the wall is zero, and hence work done is zero.
What is negative work done with example?
Negative work is performed if the displacement is opposite to the direction of the Force applied. Example:
Work was done the gravity on a rocket going perpendicular upwards.
In which process work done is zero?
Isochoric process
: It is a thermodynamic process which takes place at constant volume. In such a process, the work done is zero. The volume of the gas remains constant.
