Question

12. A car with a 1275 kg mass is to be raised on a water-filled jack by a worker who can normally exert a force of 850 N downwards. What must the area ratio be between the two cylinders on the jack when the pistons are level?

13. If the jack is liquid-filled, how far down does the operator piston have to move to raise the car by 1 cm?

14. Say the piston lifting the car has a cross-sectional are of 0.50 m2 . Once the piston holding the car is one metre above the piston operated by the worker, what extra force is required?

Answer 1