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A particle moves rectilinearly with a constant acceleration 1 m/s2. Its speed after 10 seconds is 5 m/s. The distance covered by the particle in this duration is (Initial & final velocities are in opposite direction)

Question

A particle moves rectilinearly with a constant acceleration 1 m/s2. Its speed after 10 seconds is 5 m/s. The distance covered by the particle in this duration is (Initial & final velocities are in opposite direction)

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Solution

Given:

  • Constant acceleration, a=1m/s2 a = 1 \, \text{m/s}^2
  • Time, t=10s t = 10 \, \text{s}
  • Final velocity, v=5m/s v = 5 \, \text{m/s}
  • Initial and final velocities are in opposite directions.

Step-by-step solution:

  1. Determine the initial velocity (u u ):

    Since the initial and final velocities are in opposite directions, the final velocity will be negative when considering the initial direction as positive.

    Using the equation of motion: v=u+at v = u + at Substituting the given values: 5=u+(1×10) 5 = u + (1 \times 10) 5=u+10 5 = u + 10 Solving for u u : u=510 u = 5 - 10 u=5m/s u = -5 \, \text{m/s}

  2. Calculate the distance covered (s s ):

    Using the equation of motion: s=ut+12at2 s = ut + \frac{1}{2}at^2 Substituting the known values: s=(5×10)+12×1×(10)2 s = (-5 \times 10) + \frac{1}{2} \times 1 \times (10)^2 s=50+12×1×100 s = -50 + \frac{1}{2} \times 1 \times 100 s=50+50 s = -50 + 50 s=0m s = 0 \, \text{m}

Therefore, the distance covered by the particle in this duration is 0m 0 \, \text{m} .

This problem has been solved

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