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The SI unit of force is the Newton, (kg\(\cdot\)m/s\(^2\)) and the SI unit of distance is a meter (m). The fundamental unit of work is one Newton-meter, or a joule (J). That is, applying a force of one Newton for one meter performs one joule of work.
- Exercises for Section 6.4
You intend to add decorative rope in the shape of \(...
- 6.5b
In other words, work can be thought of as the amount of...
- Exercises for Section 6.4
Work done by a constant force = (Force) × (distance moved in the direction of the force) The term −Rx in equation (3) is the work done by the resistance. The negative sign occurs since the direction of the force is opposite to the direction of motion. If the work done by a force is negative, work is said to be done against the force.
Calculate the work done by a 2.0-N force (directed at a 30° angle to the vertical) to move a 500 gram box a horizontal distance of 400 cm across a rough floor at a constant speed of 0.5 m/s. (HINT: Be cautious with the units.)
The SI unit of force is the newton, (kg ⋅ m/s 2), and the SI unit of distance is a meter (m). The fundamental unit of work is one newton-meter, or a joule (J). That is, applying a force of one newton for one meter performs one joule of work.
Review the units of work, energy, force, and distance. Use the equations for mechanical energy and work to show what is work and what is not. Make it clear why holding something off the ground or carrying something over a level surface is not work in the scientific sense.
Defining WORK Work ≡Force x Distance. That is, W = Fd Standard units of work: Force Units x Distance Units = (Newtons) x (meters) = N.m where 1 Newton.meter ≡1 “Joule.” (That is, 1 J = 1 N.m.) 𝐹Ԧ 𝑑Ԧ
Work done = force x distance (moved in the direction of the force). Work done is measured in Joule (J). Common misconception. Pupils often confuse the terms force, energy, and work done and use them interchangeably.
