How does static friction propel a car forward given a torque applied to the wheels?

  • #51
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Force on or by the axle, from my FBD.
Okay thanks. I wasn't taking into account there was a force from the axle. I always was thinking that if the torque was close to zero, then the forces would balance too. But I see that isn't the case
 
  • #52
russ_watters
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Okay thanks. I wasn't taking into account there was a force from the axle. I always was thinking that if the torque was close to zero, then the forces would balance too. But I see that isn't the case
If what torque is close to zero? Providing a large torque to the wheels at high rpm - large enough to move a 2000kg car at high speed - is most of what the engine is for!
 
  • #53
Dale
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I always was thinking that if the torque was close to zero, then the forces would balance too. But I see that isn't the case
I only solved for ##a##, but I encourage you to solve for the unknown forces for your own experience.
 

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