The discussion centers on calculating the change in kinetic energy for an 8.50 kg mass traveling at an initial speed of 7.50 m/s under the influence of a 340 N force over a 15.0 m displacement. The key equations involved are Ek = 1/2mv² for kinetic energy and W = Fd for work done. The solution requires determining the work done on the object and applying the work-energy theorem to find the change in kinetic energy, rather than relying solely on the initial speed.
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student54321 said:Homework Statement
A mass of 8.50 kg is traveling 7.50 m/s
[up]. It is acted on by a force of 340 N [up]
over a displacement of 15.0 m [up].
What is the change in kinetic energy
Homework Equations
Ek = 1/2mvsquared. F = mv. w = fd
The Attempt at a Solution
I tried doing the equation Ek = 1/2mvsquared, and was off by 3000 or so.