Question

2. A screwjack used to lift a car is a
first-class lever
second-class lever.
a.
b. pulley
d. screw.
C.
1.1

Answer 1

Screw Jack is an example of a first class lever...
Hope it helps

Answer 2

First class lever

Explanation:

• A jackscrew, or jackscrew, could be a form of jack that's operated by turning a leadscrew. it's commonly accustomed lift moderately heavy weights, like vehicles; to lift and lower the horizontal stabilizers of aircraft; and as adjustable supports for heavy loads, like the foundations of homes.
• Examples of these levers are pliers, scissors, a crow bar, a claw hammer, a see-saw and a balance. In summary, in a class one lever the trouble (force) moves over an outsized distance to maneuver the load a smaller distance, and therefore the fulcrum is between the hassle (force) and also the load.