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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Physics
Chapter
Center of Mass, Momentum and Collision

NTA Abhyas 2020 · Physics · Center of Mass, Momentum and Collision

As shown in the figure a body of mass m moving vertically with...

As shown in the figure a body of mass mm moving vertically with speed 3m/s3m / s hits a smooth fixed inclined plane and rebounds with a velocity vf{v}_{f} in the horizontal direction. If angle& of incline is 30°{30}^{°}, the velocity vf{v}_{f}& will be

As shown in the figure a body of mass m moving vertically with speed 3m / s hits a smooth fixed inclined plane and

Options

  1. A3 m/s
  2. B3m/s\sqrt{3} \text{m/s}
  3. C1/3m/s1 / \sqrt{3} \text{m/s}
  4. DThis is not possible

Correct answer

B. 3m/s\sqrt{3} \text{m/s}

Step-by-step solution

Velocity along surface remain same

3 \text\sin 3 {0}^{o} = {v}_{f} \text\sin 6 {0}^{o}

3×12=vf×323 × \dfrac{1}{2} = {v}_{f} × \dfrac{\sqrt{3}}{2}

vf=3m/s{v}_{f} = \sqrt{3} \text{m/s}
As shown in the figure a body of mass m moving vertically with speed 3m / s hits a smooth fixed inclined plane and
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