Atrain at a constant 60.0 km/h moves east for 40.0 min, then in a direction 50.0 degrees east of due north for 20.0 min, and then west for 50.0 min. what are the (a) magnitude and (b) angle for of its average velocity during this trip?

Part a)

Part b)

North of East

Explanation:

Speed of train towards East = 60 km/h

displacement towards East is given as

now it turns towards 50 degree East of North

so its distance is given as

then finally it moves towards west for 50 min

Now the total displacement of the train is given as

now total time duration of the motion is given as

now average velocity is given as

Part a)

magnitude of the average velocity is given as

Part b)

Direction of the velocity is given as

North of East

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

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-- bass singer

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since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.