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Motion in A Plane

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Physics Part I

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Physics

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Class 10 Class 12
An aircraft is flying at a height of 3400 m above the ground. If the angle subtended at a ground observation point by the aircraft positions 10s apart is 30°, what is the speed of the aircraft?

The aircraft takes 10s to go from A to B and AB subtends an angle of 30° at O.

Height of the aircraft from the groun = 3400 m

In right angled triangle OAC,



AC = OC tan 15°

     = 3400 x 0·2679

     = 911m

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Now, the speed of aircraft is,

space space straight v equals AB over straight t equals 1822 over 10 equals 182.2 space straight m divided by straight s 

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Give three examples of scalar quantities.

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