You're riding on a train that's moving at 50 km/h, and you roll a ball down the aisle at 2 km/h in the same direction as the train is moving. If a person standing on the ground near the train track could see the ball, how fast would it appear to be moving?

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Sra

50 + 2 = 52 km/h

To determine how fast the ball would appear to be moving to a person standing on the ground near the train track, we need to consider the relative velocity between the train and the ball.

The ball is already rolling down the aisle with a velocity of 2 km/h in the same direction as the train, which means its velocity with respect to the train is 2 km/h.

Now, since the train itself is moving at 50 km/h, we need to add the velocity of the train to the velocity of the ball to find the combined velocity.

Therefore, the apparent speed of the ball to a person standing on the ground near the train track would be the sum of the train's velocity and the ball's velocity, which is 50 km/h + 2 km/h = 52 km/h.