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Motion in Plane L6 | River Boat concept | Vivek Sir | Vedantu NEET Tamil@VedantuNEETTamil

Vedantu NEET Tamil・25 minutes read

The text explains the concept of relative velocity using various scenarios and formulas, including the calculation of resultant velocities and angles using vector subtraction and trigonometry. It also demonstrates how relative velocity can be applied to determine the speed of objects moving in opposite directions, such as a car passing two bikes and raindrops falling with respect to a person on the ground.

Insights

  • Relative velocity involves subtracting one velocity vector from another, crucial for determining motion in different scenarios.
  • The application of relative velocity extends to various situations, from raindrops to vehicles, emphasizing the significance of vector calculations in understanding motion dynamics.

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Recent questions

  • What is relative velocity?

    Relative velocity involves subtracting one velocity from another.

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Summary

00:00

Relative Velocity Formulas for Rain and Boat

  • Relative velocity concept involves velocity one minus velocity two, always in vector form.
  • River and boat concept includes formulas for situations where the boat moves opposite to the river flow.
  • Velocity of rain with respect to a stationary person is the velocity of rain vector minus the velocity of the person vector.
  • Relative velocity of rain with respect to a moving person is calculated using vector subtraction.
  • Resultant velocity of rain with respect to a person is found using the square root of the sum of the squares of the velocities.
  • In an inclined rain scenario, the velocity components are calculated using trigonometry.
  • The direction of the relative velocity of rain with respect to a person is determined using vector rules.
  • The resultant velocity of rain with respect to a person is calculated by combining the velocity components.
  • The angle of inclination affects the calculation of the relative velocity of rain with respect to a person.
  • The velocity of rain with respect to the ground is found by subtracting the velocity of the person from the velocity of the rain in vector form.

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Relative Velocity Calculations in Various Scenarios

  • The resultant velocity is calculated as the square root of the sum of the squares of the velocities.
  • The angle between the velocity of the person and the river is considered to be 30 degrees.
  • The speed of the water in the stream is 0.5 meters per second.
  • The shortest distance to reach the opposite bank is determined by resolving the velocities into components.
  • The velocity of the river is calculated as half the velocity of the person, resulting in 0.25 meters per second.
  • The concept of relative velocity is applied to determine the speed of a car traveling in the opposite direction of two bikes.
  • The speed of the car is found to be 75 kilometers per hour based on the relative displacement between the bikes.
  • The velocity of raindrops with respect to the ground is calculated as 20 kilometers per hour by considering the relative velocity with respect to the person.
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