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River Crossing

Set the heading. Land straight across, cross in the least time, or reach a dock downstream.

Physics · Class 11 · River-boat problems · 8 simulations. For JEE, NEET and your boards.

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What you'll learn

  1. Straight across: Aim upstream to stop the drift
  2. Least time: The current does not change the crossing time
  3. Dock downstream: Add velocities head to tail
  4. Dock upstream: Gaining ground upstream
  5. River faster than boat: When the river beats the boat: least drift
  6. On the clock: Start from the ground velocity you need
  7. Friend overboard: Ride along with the water
  8. Hidden current: Two crossing times give both speeds