If you toss a ball straight up while in a closed train car and the ball hits the front of the car, then the train car could be
a) moving backward at constant speed
b) moving forward and slowing down
c) moving forward and speeding up
d) all of these are possible
e) none of these is possible
I initially chose all of them would be possible, but that wasn't the correct answer. Would it be none of them? I'm not really sure.
accelerating to the rear, so B
when you toss the ball, it has a constant forward speed.
If the train is slowing down, the ball will move toward the front of the car, because the car is not moving as fast as the ball.