1.

The distance travelled by an object thrown upwards in t seconds is 30t − 4.9t2 metres. After how much time would it fall down? At what all times would it be 20 metres above the ground?

Answer»

The distance travelled by an object thrown upwards in t seconds is 30t − 4.9t2 metres. After how much time would it fall down? At what all times would it be 20 metres above the ground?



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