In order to accomplish work on an object
there must be a force exerted on the object and it must move in the direction of the force.
What are the conditions for work done by an object?
- A. (i) a force should act on an object, and (ii) the object must be displaced.
- B. (i) no force should act on an object, and (ii) the object must be displaced.
- C. (i) a force should act on an object, and (ii) the object must not be displaced.
- D.
What are the conditions for the work done by a given force acting on an object to be zero?
The force is always perpendicular to its velocity (dtdx=0)
. The object moves in such a way that the point of application of the force remains fixed (dx=0).
When work is done what two conditions must be met?
Two conditions must be met in order for work to be done on an object.
The first is that the object moves. The second is that a force must act on the object in the direction the objectmoves.
What is work done formula?
Mathematically, the concept of work done W equals the force f times the distance (d), that is W = f. d and if the force is exerted at an angle θ to the displacement, then work done is calculated as
W = f . d cos θ
.
What are three conditions when work done is said to be zero?
Work done is said to be zero
when force applying to the body is zero
or the Displacement done by body pic zero. if the value that means force acting on body is perpendicular then the force acting will be equals to zero.
What is no work is done?
If there is no motion in the direction of the force
, then no work is done by that force. … But the work done on the box is zero since by moving in a straight line at constant speed, its energy is remaining the same. There are many important examples of forces which do no work because they act perpendicular to the motion.
Is the rate at which work is done?
Power
is the rate at which work is done. It is the work/time ratio. Mathematically, it is computed using the following equation. The standard metric unit of power is the Watt.
When one joule work is said to be done?
1 joule of work is said to be done when
a force of 1 Newton moves an object through a distance of 1 meter in direction of force
.
What is the ability to do work called?
Energy and
Work Energy
is the capacity to do work or to produce heat. Internal energy is the sum of kinetic energy and the potential energy.
Is it correct to say work is done every time force is applied?
Whenever a force is applied to an object, causing the object to move, work is done by
the force
.
Can work done by a force be negative?
Work done by a force applied on a body is:
When the direction of motion of the body and the force acting on the body is opposite, work done is negative
. When the force is acting at a right angle to the direction of motion of the body, work done is zero.
What is current formula?
The current is the ratio of the potential difference and the resistance. It is represented as (I). The current formula is given as
I = V/R
. The SI unit of current is Ampere (Amp).
What is work done unit?
work done is measured in
joules (J)
force is measured in newtons (N) distance moved along the line of action of the force is measured in metres (m)
What is power formula?
P = E/t
: This formula is also called the mechanical power equation. Here E stands for energy in joule and t stands for time in seconds. This formula states that the consumption of energy per unit of time is called power.
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.
