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We have 20 ready-to-use problem sets on the topic of Work, Energy, and Power. These problem sets focus on the use of energy principles to mathematically analyze systems involving the motion of objects. Click a link to open a publicly-available problem set.
A person pulls a block 2 m along a horizontal surface by a constant force F = 20 N. Determine the work done by force F acting on the block. Known : Force (F) = 20 N. Displacement (s) = 2 m. Angle (θ) = 0. Wanted : Work (W) Solution : W = F d cos θ = (20) (2) (cos 0) = (20) (2) (1) = 40 Joule.
This collection of problem sets and problems target student ability to use energy principles to analyze a variety of motion scenarios.
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.
Compute the work done by the gravitational force for the following cases. Solution (As the displacement is in two dimension; unit vectors and are used) a. Since the motion is only vertical, horizontal displacement component dx is zero. Hence, work done by the force along path 1 (of distance h).
Work and Power Example Solutions. Follow along with common work and power example problems and solutions. See how to solve problems when force is applied directly parallel or at an angle. Example Work and Power Problems. 1. How much work is done by the stickman that pushes a box 5 meters with a force of 12 Newtons forward? W = (F) (d)
How much work do you do to move the child from \(\theta=0\) to \(\theta=\theta_1\)? Use a detailed diagram to show that the work done by \(\vec F\) is equal to \(mgh\), where \(h\) is the change in height of the child.
