Why Does a Yo-Yo Yo?

Vocabulario

• attach Traducir IMG
  • (attached) join, connect, link
• axle Traducir IMG
  • a rod or spindle (either fixed or rotating) passing through the center of a wheel or group of wheels
• bottom Traducir IMG
  • lowest surface
• friction Traducir IMG
  • the resistance to motion of two moving objects that touch
• gravity Traducir IMG
  • the force that attracts a body toward the center of the earth
• inertia Traducir IMG
  • a tendency to do nothing or to remain unchanged
• loop Traducir IMG
  • a shape produced by a curve that bends around and crosses itself
• momentarily Traducir IMG
  • for a very short time
• spin Traducir IMG
  • (spun) rotate, twist
• unwind Traducir IMG
  • (unwound) to undo something that is rolled

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