**Part a**

Δx = x_{f} - x_{i} = 40 - 10 = 30 m

Part a. What is the overall displacement Δx of the particle?

Part b. What is the average velocity v_{av} of the particle over the time interval Δt = 50.0s?

Part c. What is the instantaneous velocity v of the particle at t=10.0s?

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What scientific concept do you need to know in order to solve this problem?

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Based on our data, we think this problem is relevant for Professor Mchugh's class at UNC.