It makes no difference. The momentum of either car goes to zero in both cases.
You can increase the capacitance of a capacitor by decreasing the plate spacing (A) or by increasing the area of the plates (D).
'A' and 'D' both do the job, so the correct choice is<em> (E)</em> .
Part A: a->positive when velocity is increasing a->negative when velocity is decreasing a->zero when velocity is constant
The same volume of aluminum has a smaller mass than iron and aircrafts better be light.
Answer:

Explanation:
Maximum height reached by the ball after being popped by the bat is given as

now we know by energy conservation final speed of the ball after being hit by the bat is given as




now the change in momentum of the ball is given as


now force is given as rate of change in momentum



so magnitude of the force is given as

