the displacement from hastings to kearney is 36 miles at 12* North of West. The

Question

the displacement from hastings to kearney is 36 miles at 12* North of West. The displacement from Kearney to Grand Island is 39 miles at 21* North of East. what is the displacement from Hastings to Grand Island by components? Part B. If you drive from Hastings to Kearney in 65 minutes, stop for 10 minutes, then dive from Kearney to Grand Island in 54 minutes, find: A. Average Velocity from Hastings to Kearney B. Ave. Velocity from Kearney to Grand Island C. Ave. Velocity for the total trip from Hastings to Grand Island

Explanation / Answer

the displacement from Hastings to Grand Island by components: x = -36 cos 12 + 39 cos 21 = 1.196 miles y = 36 sin12 +39 sin 21 = 21.461 miles. resultant = 21.5 miles. A. Average Velocity from Hastings to Kearney = 36*60/65 = 33.23 miles/hr B. Ave. Velocity from Kearney to Grand Island= 39*60/54 = 43.33 mph C . Ave. Velocity for the total trip from Hastings to Grand Island = 21.461*60/ 65+10+54 = 9.98 mph

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