Acar undergoing uniform acceleration travels 100 meters from a standing start in a given period of time. if the time were increased by a factor of four, calculate the displacement.

d = 1600 m

Explanation:

If car start from rest and accelerates uniformly then the displacement of the car is given as

now we know

now if the same car will accelerate from rest for four times of the previous time interval

then we will have

so the distance will be 16 times more

an obstruction

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it