when an object dropped downward it reaches with velocity 6mpersecond if it thrown downward with velocity 8mpersecond what is final velocity?

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration

It is really hard for me right know

Atriangle with equal sides of length 10 cm has -2.5-nc charged objects at each corner. part a determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. horizontally rightward vertically downward vertically upward horizontally leftward