On a hot summer day several swimmers decide to dive from a railroad bridge into the river below. The swimmers stepped off the bridge, and I estimated...

On a hot summer day several swimmers decide to dive from a railroad bridge into the river below. The swimmers stepped off the bridge, and I estimated that they hit the water 1.4 s later. (a) How high was the bridge? (b) How fast were the swimmers moving when they hit the water? (c) What would the swimmer's drop time be if the bridge were twice as high?