A 6m long lever is pivoted 2m away from one end a 30 kg body is placed on this end. If a force of 200N is applied on the other end (draw a simple diagram)
and find
a. The order of the lever
b. M. A
c.
Wi
d. Wo
e.
If the V. R is twice the M. A find the efficiency of the machine​

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

Need only answer if you think you know it

Identify the correct relation showing that the radius r of the orbit of a moon of a given planet can be determined from the radius r of the planet, the acceleration of gravity at the surface of the planet, and the time τ required by the moon to complete one full revolution about the planet. determine the acceleration of gravity at the surface of the planet jupiter knowing that r = 71 492 km and that t= 3.551 days and r= 670.9 × 10^3 km for its moon europa.