Which statement is true? Select one:
O a. Social media is not a reason some people have negative attitudes
towards their bodies.
O b. Physical fitness is a fad.
O c. You must be an athlete to be physically fit.
Od. Heredity does not control your ability to participate.

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

Apulley with mass mp and a radius rp is attached to the ceiling, in a gravity field of 9.81 m/s2 and rotates with no friction about its pivot.

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.