Newton's Laws of Motion
 

Newton's Laws of Motion problem 41


A car is driven on a flat road. The force of the engine is constantly opposed by the force of air resistance, which depends on the speed of the vehicle. Consider four cases:

  • The engine force is equal to the resistance force. The magnitude of each is 0 N.

  • The engine force is 800 N and the resistance force is 200 N.

  • The engine force is equal to the resistance force. The magnitude of each is 400 N.

  • The engine force is 200 N and the resistance force is 400 N.

Which of the cases does Newton's first law describe?


 

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