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Question

you watch a distant farmer driving a stake into the ground with a sledgehammer.he hits the stake at a regular rate of one stroke per sec.you hear the sound of the blows exactly synchronized with the blows you see.and then you hear one more blow after you see him stopo hammering.how far away is the farmer?explain

Answer 1

Hearing the sound of the blows synchronized with the blows we see and then hearing one more blow after we see the farmer stop hammering means that the sound travels exactly 1 s from the farmer to where we stand. Taking the speed of the sound 340 m/s this means that the farmer is 340 m away.