Physics Tutorial 6.3 - Newton's Second Law for System of Particles Revision Questions

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6.3Newton's Second Law for System of Particles

Newton's Second Law for System of Particles Revision Questions

1) Two forces are acting horizontally on a system of two particles connected through a very light and non-stretchable stick as shown in the figure.

Physics Tutorials: This image provides visual information for the physics tutorial Newton's Second Law for System of Particles

What is the acceleration of the system (and in which direction does it occur)?

  1. 3 m/s2 right
  2. 6.5 m/s2 right
  3. 6 m/s2 left - down
  4. 6 m/s2 right

Correct Answer: D

2) Two particles are initially at the positions shown in the figure.

Physics Tutorials: This image provides visual information for the physics tutorial Newton's Second Law for System of Particles

What is the acceleration of the system written in two decimal places?

  1. 3.33 m/s2
  2. 4.57 m/s2
  3. 1.14 m/s2
  4. 0.00 m/s2

Correct Answer: A

3) A system of three particles are shown in the figure below.

Physics Tutorials: This image provides visual information for the physics tutorial Newton's Second Law for System of Particles

Where will the centre of mass be after 3 s if the system starts moving from rest?

  1. (10.1 m, 10.6 m)
  2. (12.4 m, 5.25 m)
  3. (9.1 m, 5.4 m)
  4. (12.85 m, 1.65 m)

Correct Answer: B

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