1. A 3.0kg body is at rest on a frictionless horizontal air track when a constan

Question

1. A 3.0kg body is at rest on a frictionless horizontal air track when a constant horizontal force F acting in the positive direction of an x axis along the track is applied to the body. A stroboscopic graph of the position of the body as it slides to the right is shown in Fig. 7-26. The force F is applied to the body at x = 0, and the graph records the position of the body at 0.50 s intervals. How much work is done on the body by the applied force F between t = 0 and t = 2.0 s?

Explanation / Answer

Ok because i dont have the graph, I will use a variable s for thedistance travelled in the 2sec. the work done by a force can be calculated with the formulaW=F*s F is unknown and can be calculated with F= m*a but a is also unknown and can be calculated withs=0.5*a*t2 ---> a=(2s)/t2 =2s/4=0.5s F=3.0*0.5s=1.5s W=1.5s*s= 1.5s2 so you only have to fill in the travelled distance and you haveyoure awnser

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