Question

10.In a car lift compressed air exerts a force F_(1) on a small piston having a radius of 4.0cm.This pressure is transmitted to a second piston of radius 12cm.(see figure).If the mass of the car to be lifted is 1200kg.Calculate F_(1).What is the pressure necessary to accomplish this task? (g=9.8ms^(-2))​

Answer 1

Answer:

From pascal’s law

P

1

=P

2

A

1

F

1

=

A

2

F

2

πr

1

2

F

1

=

πr

2

2

F

2

F

1

=

r

2

2

F

2

r

1

2

F

1

=

(15×10

−2

)

2

1350×9.8×(5×10

−2

)

2

F

1

=1470N

F

1

=1.47×10

3

N