Question

if your friend said that his toy can accelarate uniformly at 1.5m/s²,what is its initial speed if you record its finalspeed as7.5m/s after 5.0s running?​

Answer 1

`a = (vf - vi)/(t)`

`1.5 = (7.5 - vi)/(5.0)`

`1.5(5.0) = (7.5 - vi)/(5.0) (5.0)`

`7.5 = 7.5 - vi`

`7.5 - 7.5 = 7.5 - 7.5 - vi`

`0 = vi`

The car's initial speed is 0 m/s

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`a = (7.5 - 0)/(5)`

`a = 1.5`