Galilean relativity: A woman standing still at a train station watches two girls throwing a tennis ball in a moving train. Suppose the train is moving east with a constant speed of 25 m/s, and one of the girls throws the ball with a speed of 10 m/s with respect to herself towards the other girl, who is 5 m west from her. What is the velocity of the ball as observed by the woman on the station? Explain your reasoning!

Chapter 37, Problem 025 = 780 m. As detected by observer S', the two flashes Observer S detects two flashes of light. A big flash occurs at x1 = 1390 m and, 5.13 µs later, a small flash occurs at x2 occur at a single coordinate x'. (a) What is the speed parameter of S', and (b) is S' moving in the positive or negative direction of the x axis? To S', (c) which flash occurs first and (d) what is the time interval between the flashes? (a) Number Units (ь) (c) (d) Number Units

1. Taking north as positive and south as negative for all reference frames, suppose Mayor Adams is riding a southbound train to New York City traveling at 40 m/s relative to the ground, while Governor Hochul is riding a northbound train to Albany at 33 m/s relative to the ground. A) What is the velocity of Mayor Adams in Governor Hochul's reference frame (i.e. in the reference frame where Governor Hochul isn't moving)? B) What is the velocity of Governor Hochul in Mayor Adams reference frame? C) To his surprise Mayor Adams observes a groundhog running along the aisle towards the back of the train with a speed of 2 m/s relative to the train. What is the velocity of the groundhog in Governor Hochul's reference frame? D) What is the groundhog's velocity in the reference frame of someone standing at the train station? E) What is its velocity in Mayor Adams's reference frame? F) What is its velocity in the groundhog's frame? 30 10 ft. 5 ft. 15 ft.

Suppose 5 rocketships are all traveling in â in some frame S. The speeds are: St (min) 100 B 0 0.25 0.5 0.75 0.99 7 1 How much time passes on the clocks inside each rocketship if 100 minutes elapse on the stationary rocketship?