Elle is playing with a ball in a bus that moves in a straight line with constant velocity. what can you say about the motion of the ball in the moving bus if elle throws the ball vertically upwards?
a the ball will fall back to her
b the ball will land ahead of her
c the ball will land behind her
d the ball will move to the right

Given that they are all on the same bus that is travelling in a straight line at the same velocity, when Elle throws the ball directly upwards, the ball will simply fall back to her. This is because the bus, Elle, and the ball are all travelling in the same direction and at the same speed. Among the choices, the correct answer is A.