Podcast
Questions and Answers
What is the work done by a force when the displacement is perpendicular to the force?
What is the work done by a force when the displacement is perpendicular to the force?
- Maximum possible work
- Dependent on the angle between the force and displacement
- Equal to the product of force and displacement
- Zero (correct)
Which scenario represents the maximum work done by a force?
Which scenario represents the maximum work done by a force?
- A box is pushed at an angle of 60° to the horizontal
- A object is lifted straight up with a vertical force
- A person is pushing a cart along a flat surface in the direction of motion (correct)
- A force applied to a lever with no displacement
Which expression represents work done if the angle between the force and displacement is 0°?
Which expression represents work done if the angle between the force and displacement is 0°?
- W = 0
- W = F s sin θ
- W = F s (correct)
- W = F s cos 90°
In which of the following cases is zero work done?
In which of the following cases is zero work done?
What is the role of the angle θ in calculating work done?
What is the role of the angle θ in calculating work done?
What is the angle of the applied force with the displacement if the work done is 0%?
What is the angle of the applied force with the displacement if the work done is 0%?
If a force of 10 N is applied at an angle of 60° to a displacement of 5 m, how much work is done?
If a force of 10 N is applied at an angle of 60° to a displacement of 5 m, how much work is done?
In the scenario where an object is pulled horizontally and raised vertically, what is the work done vertically if the mass is 2 kg and the height raised is 5 m?
In the scenario where an object is pulled horizontally and raised vertically, what is the work done vertically if the mass is 2 kg and the height raised is 5 m?
Which of these units represents work in the SI system?
Which of these units represents work in the SI system?
What is the net work done on a box with a mass of 3 kg pulled with a force of 12 N over a distance of 2 m on a horizontal plane, then raised to a height of 3 m?
What is the net work done on a box with a mass of 3 kg pulled with a force of 12 N over a distance of 2 m on a horizontal plane, then raised to a height of 3 m?
Flashcards
Work done by a force
Work done by a force
The product of the displacement and the component of the force in the direction of the displacement.
Maximum Work
Maximum Work
Work done when the force and displacement are in the same direction.
Importance of angle (θ)
Importance of angle (θ)
The angle between force and displacement affects the work done.
Zero Work
Zero Work
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Work formula
Work formula
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Negative Work
Negative Work
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Work Done by a Constant Force
Work Done by a Constant Force
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Work Done by a Variable Force
Work Done by a Variable Force
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Work is a scalar quantity
Work is a scalar quantity
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What angle between force and displacement results in 50% work done?
What angle between force and displacement results in 50% work done?
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Study Notes
Work
- Work is defined as the product of the displacement and the component of the force in the direction of the displacement.
- Formula: W = Fscosθ, where F is force, s is displacement, and θ is the angle between F and s.
- Maximum work occurs when θ = 0°, W = Fs.
- Zero work occurs when θ = 90°, W = 0.
- Work is zero if the displacement is zero or if the force and displacement are perpendicular.
Examples of Zero Work
- Pushing against a wall: no displacement
- Centripetal force along the radius of a circular path: force and displacement are perpendicular.
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Description
Test your understanding of work in physics, including the formula and conditions for maximum and zero work. This quiz covers key concepts such as force, displacement, and the angles involved. Ace it by applying your knowledge to various scenarios!
