PROBLEM 1: On a certain stretch of track, trains run at 60 mph. How far back of a stopped train should a warning torpedo be placed to signal an oncoming train? Assume that the brakes are applied at once & retard the train at the uniform rate of 2ft per sec^2.
PROBLEM 2: A stone is thrown vertically upward & returns to earth in 10 sec. What was its initial velocity how high did it go?
PROBLEM 3: A ball is dropped from the top of a tower 80 ft high at the same instant that a SECOND ball is thrown upward from the ground with an initial velocity of 40 ft/sec. When & Where do they pass, & with what relative velocity?
PROBLEM 4: A stone is dropped down a wall & 5 seconds later, the sound of the splash is heard. If the velocity of sound is 1120 ft/s, what is the depth of the well?
PROBLEM 6: A stone dropped from a captive balloon at an elevation of 1000 feet. Two seconds later, another stone is projected vertically upward from the ground with a velocity of 248 ft. per sec. If G is 32 ft. per sec, when and where will the stones pass each other?
PROBLEM 7: A stone is thrown vertically upward from the ground with a velocity of 48.3 ft per sec. One second later another stone is thrown vertically upward with a velocity of 96.6 ft per sec. How far above from the ground will the stone be at the same level?
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