It takes Harry 38 {\ m s} to walk from x_1 = -12 {\ m m} to x_2 = -42 {\ m m} .

Question

It takes Harry 38 { m s} to walk from x_1 = -12 { m m} to x_2 = -42 { m m} .

Part A
What is his velocity? Please answer using two sig figs in m/s.

Part B
Alberta is going to have dinner at her grandmother's house, but she is running a bit behind schedule. As she gets onto the highway, she knows that she must exit the highway within 49 { m min} if she is not going to arrive late. Her exit is 49 { m mi} away.

What is the slowest speed at which she could drive and still arrive in time?
Please answer in mph with two sig figs.

Explanation / Answer

part a distance travel = |-42 - (-12)| = 30m velocity = 30 / 38 = 0.79 m/s part b 49 min = 49/60 hours speed = 49/(49/60) = 60 mph

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