3. Someone is speeding on the road at 89 mph (39.8 m/sec). A police car is coming from opposite direction at 95 mph (42.5 m/s) with a siren frequency of 1200 Hz. Find the frequency heard by the driver. Take the speed of sound at 20C as 343 m/sec. a. 1189 Hz b. 1528 Hz c. 1192 Hz d. 1211 Hz

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Q: The magnitude of the component force F is * 250 Ib -450~ 30

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Q: y F1 = 30 N %3D 3 4 F3 = 50 N 20° F2 = 20 N

A: →F1 = 30 ((-4/5) i^+ (3/5)j^) →F1 = -24i^ + 18j^→F2 = 20 ((-sin20o) i^- (Cos20o)j^) →F2 = -6.84i^ -…

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Scalars and Vectors

Scalars and Vectors are the classification of physical quantities that are used to denote various terms in physics.