Why work done is zero when angle is 90?

Work is a scalar quantity, i.e., it only has magnitude and no direction. The value of cos 90° is 0, and as we know when anything is multiplied with 0 the product is 0. It is due to this, we say that the work done when the angle between force and displacement is 90º.

Can work be done at 90 degrees?

Regardless of the magnitude of the force and displacement, F*d*cosine 90 degrees is 0 (since the cosine of 90 degrees is 0). A vertical force can never cause a horizontal displacement; thus, a vertical force does not do work on a horizontally displaced object!!

Why is 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. Thus, the force applied and the displacement are in perpendicular directions. So, the work done is zero.

Why work done is zero when force is perpendicular to velocity?

denotes dot( or scalar ) product of force F( vector) and ds ( vector) is infinitesimally small displacement. The direction of ds is the same as direction of intentaneous velocity. So, in our problem F and ds are mutually perpendicular to each other at all the points of the trajectory and therefore , work done is zero.

Can work Physics be 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.

What is meant by zero work?

ZERO WORK:The work done is said to be zero work when force and displacement are perpendicular to each other or when either force or displacement is zero. example: When we hold an object and walk,the force acts in downward direction whereas displacement acts in forward direction.

What does it mean when work is 0?

The work is zero when there is no displacement of the object along the line of force. So if for example you have a heavy wooden crate and you’re trying to push it and you’re not able to, the work done by you is zero even though you’re applying a force.

When angle between force and displacement is 90 then work done is?

Answer:Work done =0, when angle between 2 objects is 90 degree.

Why dont perpendicular forces work?

For (1), since perpendicular forces do not change the magnitude of velocity (only their direction), the perpendicular force should not enter into the equation of work (since it does not contribute to the energy change).

What would have the work done if force on the object is 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).

What is the work zero?

Zero work is defined when force and displacement are perpendicular to one another and when force or displacement is zero. Example: The force acts in a downward direction, If you push a wall, it doesn’t move there’s no work done.

When the angle between the force and displacement is zero?

When the angle between the force and displacement = zero , The work done is maximum when the direction of force is the same as the direction of displacement , such as a person pulling an object through a certain distance .

What is the value of work done if Theta is 90 degrees?

W = F.d = F X d X Cos (theta) where theta is the angel between the force and displacement vectors. So if theta is 90 degree, the Cos of 90 = 0 and therefore work done would be Zero. You might want to imagine a force that acts on a body but the displacement happens at 90 degrees.

Why is the work done in circular motion zero?

From the above formula, it is quite clear that the work becomes zero when the angle between the force and displacement is 90 (or 270 based on what direction you take as the positive x axis) This is why the ‘work done’ in circular motion is zero. The angle between Force and displacement should be 90 degrees for work done to be zero .

What is the value of cos(0) if force is zero?

However if the force and displacement were both in the same direction, the angle would have been zero and Cos (0) = +1. Work done would have been W= Fd or a positive value. Hence positive work would have been done by the force.