How to calculate the jacking forces

[sctong147]

how to calculate the jacking forces when i jack up a car to replace tyre?Thanks...

 

[Doc Al]

Hint: Treat it as a lever. The minimum force you can exert must be such as to balance the torque due to the weight of the car about the fulcrum.

 

[sctong147]

Hint: Treat it as a lever. The minimum force you can exert must be such as to balance the torque due to the weight of the car about the fulcrum.

ok,thanks...