At which angle is the work done 0?

At which angle is the work done 0?

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

At what angles is work negative?

If the angle is 0 degrees (that is, the force is in the same direction as the motion), then the force does positive work upon the object. And if the angle is 180 degrees (that is, the force is in the opposite direction of the motion), then the force does negative work upon the object.

When theta is obtuse then work done is?

negative
Whenever angle (theta) between the force and the displacement is obtuse, i.e., 90^∘ < theta < 180^∘ , the work done is negative.

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.

What do you mean by zero work done?

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 is the formula for finding an obtuse angle?

cos θ = −cos (180° − θ), where 90° < θ < 180°. In words this says: the sine of an obtuse angle equals the sine of its supplement, the cosine of an obtuse angle equals minus the cosine of its supplement.

How do you know if an angle is obtuse?

An obtuse angle is a type of angle that is always larger than 90° but less than 180°. In other words, it lies between 90° and 180°.

Is work done by gravity negative or positive?

Work done under gravity is negative or positive depending on the direction in which the body is moving. If the body moves downward,Work done is positive ,if it moves upward the work done is against the gravity and is negative..

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.

When angle between force and displacement is obtuse work done by the forces?

Work done is positive if the displacement is in the direction of the applied force i.e. when angle between the force and displacement is acute angle and is negative when displacement is the direction opposite to the direction of applied force i.e. when the angle between the force and displacement is obtuse angle.

When angle between force and displacement is obtuse work done by the force is *?

Whenever angle (θ) between the force and the displacement is obtuse, i.e., 90∘<θ<180∘, the work done is negative.

Which angle is an obtuse angle?

All the angles below are obtuse angles: Which Angle? Remember to look carefully at which angle you are being asked to name. The obtuse angle is the smaller angle. It is more than 90° and less than 180°. If you choose the larger angle you have a Reflex Angle (more than 180° but less than 360°) instead:

How do you find an obtuse angle with sin and cosine?

All of the normal rules still work for obtuse angles with COSINE. Use the cosine rule as normal. Example – Find the angle x. For SIN the answer will come out between 0 and 90. Use the SIN rule as normal but you will then need to subtract this from 180° to get the correct obtuse angle.

How do you find the Tan of an obtuse angle?

TAN for Obtuse Angles For Tan, if you know the angle is obtuse, you must add 180° to your initial answer. Example – Angle x is obtuse. Find the angle x when Tan x = -0.2.

How to extend the definition of trigonometric ratios to obtuse angles?

To extend our definition of the trigonometric ratios to obtuse angles, we use a Cartesian coordinate system. We put an angle the terminal side opens in the counter-clockwise direction. -axis. r. With this notation, our definitions of the trigonometric ratios are as follows.