Your car weighs 20000 newtons and your jack has a mechanical advantage of 50. What force will you have to apply to lift one half of the car off the road to change the tyre?Thanks in advance ]
Since you are lifting half the car, you are in effect lifting only 10,000 N. since you have a mechanical advantage of 50, you require a 50th of this force to be applied to the jack. So the answer is 200N.
