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3. The Voyager 1 Space Probe Is Traveling in a Straight Line at a Constant Speed of 38,000 Mph.Use The Work-Kineti Energy Theorem to

Question

3. The Voyager 1 Space Probe is traveling in a straight line at a constant speed of 38,000 mph.Use The Work-Kineti Energy Theorem to explain why no additional force is needed to keep it moving.

Solution

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Answer

The Work-Kinetic Energy Theorem states that the net work done on an object is equal to the change in its kinetic energy. Since Voyager 1 is traveling at a *constant* speed, its kinetic energy is also constant (kinetic energy depends on speed). Therefore, the change in kinetic energy is zero. If the change in kinetic energy is zero, then the net work done on the probe must also be zero.If no net work is being done, then no