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Chapter 7: Newton’s Third Law

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Pages: 159 - 181

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76 Questions for Chapter 7: Newton’s Third Law

  1. A soccer ball and a bowling ball have a head-on collision at this instant. Rolling friction is negligible.

    Found on Page 177
  2. You find yourself in the middle of a frozen lake with a surface so slippery μs=μk=0 you cannot walk. However, you happen to have several rocks in your pocket. The ice is extremely hard. It cannot be chipped, and the rocks slip on it just as much as your feet do. Can you think of a way to get to shore?Use pictures, forces, and Newton's laws to explain your reasoning.

    Found on Page 176
  3. A 3000kgmeteorite falls toward the earth. What is the magnitude of the earth’s acceleration just before impact? The earth’s mass is5.98×1024kg.

    Found on Page 177
  4. Will hanging a magnet in front of the iron cart in the given figure make it go? Explain.

    Found on Page 176
  5. The foot of a 55kgsprinter is on the ground for 0.25swhile her body accelerates from rest to 2m/s.

    Found on Page 177
  6. The given figure shows two masses at rest. The string is massless and the pulley is frictionless. The spring scale reads in kg. What is the reading of the scale?

    Found on Page 176
  7. A steel cable lying flat on the floor drags a 20kgblock across a horizontal, frictionless floor. A 100Nforce applied to the cable causes the block to reach a speed of 4m/sin a distance of 2m.

    Found on Page 177
  8. ERTFHUJIOP[7

    Found on Page 161
  9. The figure shows two masses at rest. The string is massless and the pulleys are frictionless. The spring scale reads in kg. What is the reading of the scale?

    Found on Page 176
  10. The hand in the figure is pushing on the back of block A. Blocks A and B, with mb>maare connected by a massless string and slide on a frictionless surface. Is the force of the string on B larger than, smaller than, or equal to the force of the hand on A? Explain.

    Found on Page 176

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