acceleration and speed?

Question

a truck is stopped at a stoplight. when the light turns green, it accelerates at 2.5m/s2. at the same instant, a car passes the truck goin 15m/s. where and when does the truck catch up with the car

Answer 1

Ok. Assuming the car goes on at the same speed.
Let us say that after time t seconds the truck catches up with the car.
So (1/2) * accl of truck * t^2 = Speed of car * t
This is because both of them travel equal distances when the truck catches up with the car.
So (1/2) * 2.5 * t^2 = 15 * t
t = 12
So the truck catches the car after 12 seconds.
Distance travelled in 12 seconds = 15*12 = 180 m

Answer 2

Acceleration- Rate of change of velocity is called as acceleration.It is vector quantity.
Speed-change in distance per unit time is called speed.It is scalar quantity

Answer 3

The speed is the length you travel in secondsor kinutes.The accleration is the agility of speed.

Answer 4

d = vt = (a/2)t^2
15(t) = 1.25t^2
t = 12 s
d = 180 m

Answer 5

Is this a trick question?

Answer 6

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