A toy car with charge q moves on a frictionless horizontal plane surface under the influence of a un

A toy car with charge q moves on a frictionless horizontal plane surface under the influence of a uniform electric field vec E . Due to the force qvec E , its velocity increases from 0 to 6 m/s in one - second duration. At that instant, the direction of the field is reversed. The car continues to move for two more seconds under the influence of this field. The average velocity and the average speed of the toy car between 0 to 3 seconds are respectively:

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Explanation:

The time interval 0s<t<1 s: velocity increases from 0 m/sec to 6m/sec.

The time interval 1s<t<2 s: velocity decreases from 6 m/sec to 0m/sec.

The time interval 2s<t<3 s: velocity increases from 0 m/sec to -6m/sec.

Distance traveled in the first interval

S=((u+v)/2)t=(0+6)/2×1=3m

The average speed 9m/3s=3m/sec

Displacement =3m

the speed 3m/3s=1m/s

Final Answer:

The average velocity and the average speed of the toy car between 0 to 3 seconds are respectively 1m/sec and 3m/sec.

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