5) A spear of length 8.0 m is thrown with high velocity through the open windows of a room 6.0 m long. (a) (5 pts) How fast must the spear move so that it barely fits in the room when passing through? (b) (5 pts) In the spear’s reference frame, which occurs first: (1) the front of the spear leaving the room or (2) the rear of the spear entering the room? What is the time difference in ns? Hint: From (a) these two events occur simultaneously for someone at rest in the room.
5) A spear of length 8.0 m is thrown with high velocity through the open windows...
A spaceship travels through the dock of a space station without slowing down. The speed of the spaceship relative to the station is v = 4c/5, where c is the speed of light. Consider frames of reference in the standard configuration with v and all distances aligned along the x-axis. Primed variables refer to events in the station frame and unprimed to events in the spaceship frame. The dock has a length of L′ = 200 m in the station...
Bob places a neutrally charged conducting ball next to a large, charged plate. The conducting ball is weakly attracted to the plate. What is the net charge on the plate? 1. a) Positive b) Negative c) Neutral (i.e., zero charge) d) Either positive or negative, but it is impossible to tell which A +1 C charge is at the origin, and a second +1 C charge is at position (x,y)-(2 m, 0). How much work is required to move the...