what should be the angle between the direction of force and the direction of displacement for work to be negative
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What should be the angle between the direction of force and the direction of motion of a body so that the work done is zero?
What should be the angle between the direction of force and the direction of motion of a body so that the work done is zero?
Byju's Answer Standard IX Physics Work What should b... Question
What should be the angle between the direction of force and the direction of motion of a body so that the work done is zero?
Open in App Solution The angle should be 90 ∘
between force and displacement, for the work to be zero.
Suggest Corrections 6
SIMILAR QUESTIONS
Q. What should be the angle between the direction of force and the direction of motion of a body so that the work done is zero?Q. In which of the following case the work done by a force will be maximum : when the angle between the direction of force and direction of motion is 0° or 90°?Q.A force F acts on a body and displaces it by a distance S in a direction at an angle
θ
with the direction of force.
(a) Write the expression for the work done by the force.
(b) What should be the angle between the force and displacement to get (i) zero, (ii) maximum, work?
Q. A forceF
acts on a body and displaces it by a distance
S
in a direction at an angle
θ
with the direction of force. What should be the angle between the force and displacement to get zero work?
Q.A non-zero force is acting on a body but work done is zero. Which of the following statements justify the above situation?
1. Distance moved is zero.
2. Force is perpendicular to the direction of motion.
3. Force is in the direction of motion.
4. Force is opposite to the direction of motion.
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In case of negative work, the angle between the force and displacement is :
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Question
In case of negative work, the angle between the force and displacement is :
A0∘
B45∘
C90∘
D180∘ Easy Open in App
Updated on : 2022-09-05
Solution Verified by Toppr
Correct option is D)
Answer is D.Work done can be positive,negative and zero. When a body is being lifted in the upward direction, the force of gravity is acting in the downward direction. But, the displacement of the body is in the upward direction. Since the angle between the force and displacement is 180 degrees, the work done by the gravitational force on the body is negative. Diagrammatic representation is given.Hence for negative work done, angle between force and displacement is 180
0 .
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What is the angle between force and direction of displacement when negative work is done?
Answer (1 of 2): The angle between the force and direction of displacement must be 180^0 in the case of negative work done. For example, when a person pulling a water-filled bucket from a well the work is done by the gravitational force is negative. This is because the force is acting in the dow...
What is the angle between force and direction of displacement when negative work is done?
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Sort Nagabharana Rm
M.Sc in Physics, Bangalore University (Graduated 2017)Author has 143 answers and 169.5K answer views2y
The angle between the force and direction of displacement must be
180 0 1800
in the case of negative work done.
For example, when a person pulling a water-filled bucket from a well the work is done by the gravitational force is negative. This is because the force is acting in the downward direction and displacement is in the upward direction. Therefore the angle between them is
180 0 1800
which results in the negative work done when substituted in the equation
W= F g scosθ. W=Fgscosθ.
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Calvin Taylor
Knows Da Wae of PhysicsAuthor has 286 answers and 755.3K answer views4y
Related
What should be an angle between the direction of force and displacement for maximum and minimum work?
We know that W = F•s = Fscosθ
So, the angle for maximum work would be the angle for the maximum value of θ here, which is 0°, as cos0° is equal to 1.
If the angle is 90° (π/2), then no work is done by the force on the object, as cos90° is equal to zero.
If the angle lies between 0° and 180° (π), then the work is done against the force. Thus, it will be a negative quantity, which is the minimum you're looking for.
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Gautham Barathwaj Padmanaban
Wandering along the meanders of lifeAuthor has 133 answers and 165.3K answer views6y
Related
What should be the angle between force and displacement so that no work is done?
Work is a scalar quantity. It is the dot product of the force vector and the displacement vector.
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.
Rajesh
Bachelor's in Mechanical Engineering & Marine Engineering, Mumbai, Maharashtra, India (Graduated 2002)Author has 143 answers and 550.9K answer views5y
Related
What should the angle between force and displacement be so that the work done is negative?
Doing negative work means you're taking energy out of a system.
If the force and the displacement are parallel but in opposite directions (i.e. when the angle between force & displacement, θ = 180 deg), then the mechanical work done is negative.
Similarly if the force & displacement are parallel & in the same direction (i.e., θ = 0), then the mechanical work done is positive.
If the force acts perpendicular to the displacement (i.e., θ = 90 or 270) then zero work is said to be done by the force.
Soumyaneel Mukherjee
Lives in Kolkata, West Bengal, India (2005–present)Author has 2.2K answers and 1.2M answer views2y
The angle between force and direction of displacement when negative work is done is 180°
W = Fs cos theta --W = F×s cos theta cos theta = --W/Fs cos theta = --1 cos theta = cos 180 theta = 180°>
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Ashis Saha
Studied at Physics (college major)4y
Related
What should be the angle between force and displacement for maximum work?
Work W = F.S = FS Cos(theta)
F being force & S displacement.
Where theta is the angle between F & S.
So if theta = 0 or π, in other words if force and displacement are parallel , then work is maximum.
John Yelton
D.Phil in Physics, University of Oxford (Graduated 1981)Upvoted by
Bert Willke
, Ph.D. Physics, Massachusetts Institute of Technology (1963)Author has 3.1K answers and 865.5K answer views2y
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Can we say work done is negative if the angle between force and displacement is greater than 90° and less than 270°?
Yes we can. If you do negative work on a moving object it will slow it down. The net work done on a body is the change in its kinetic energy.
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