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# Frames of Reference

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A set of slides created to teach Frames of Reference P to learners at Bishops Diocesan College in Cape Town.

A set of slides created to teach Frames of Reference P to learners at Bishops Diocesan College in Cape Town.

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### Transcript

• 1. Reference Frames K Warne For FULL presentation click HERE >> www.warnescience.net
• 2. Relative velocity example   Car A moves towards the EAST at 10 m.s-1 Car B moves towards car A in the opposite direction at 20 m.s-1 B 20 m.s-1 A 10 m.s-1 ROAD  The velocity of Car A relative to the Road? VAR = …… m.s-1 EAST  The velocity of Car B relative to the Road? VBR = …… m.s-1 EAST  The velocity of Car A relative to Car B? VAB = …………………….. (Note …………….) = …………………….. SAMPLE ONLY SAMPLE ONLY = …………………….. For FULL presentation click HERE >> www.warnescience.net
• 3. Relative Velocity in Two Dimension VAG VPA = 250km.h-1 VAG = 40km.h_1    VPA VPG Velocity of Plane relative to Air: VPA = 250 km.h-1 NORTH Velocity of Air relative to Ground: VAG = 40 km.h-1 m.s-1 EAST Velocity of Plane to Ground: Vector Sum: VPG = VpA + VAG = 2502 + 402 = 253.2 km.h-1 Direction: tan  = 4/25 .:  = 9.09o SAMPLE ONLY SAMPLE ONLY For FULL presentation click HERE >> www.warnescience.net
• 4. Velocity Example Steamer • A steamer is sailing 20o directly north at Smoke 25km.h-1. 25km.h-1 • The wind is blowing 45o from the south west. Wind • The smoke from the w chimney is seen to blow in the direction of 20o E of N. 135o s • Find, by calculation, the o 20 speed of the wind. 25 45o 180-(135+20)=25o sin25o sin20o = 25 w w = 20.23km.hr-1
• 5. WarneScience Hi… This is a SAMPLE presentation only. My FULL presentations, which contain a lot more slides and other resources, are freely available on my resource sharing website: www.warnescience.net (paste into your browser if link above does not work) Have a look and enjoy! Keith Warne For FULL presentation click HERE >> www.warnescience.net