19. (a) The change in kinetic energy is()22224341112100 kg51 km/h41 km/h2229.66 10 kg km/h10 m/km 1 h/3600 s7.5 10 J.fiKmvmvΔ=−=−=×⋅(b) The magnitude of the change in velocity is () ()()2241 km/h51 km/h65.4 km/hifvvvΔ= − += −+=Gso the magnitude of the change in momentum is ΔΔGGpmv==FHGIKJ⋅2100
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.