PLS HELP!! A 55-newton person pulls herself up 4.0 meters. The first time took her 2.5 seconds. The second time took her 3 seconds. By doing the work to pull herself up, what changed the second time?
a. power decreased
b. no power changed
c. GPE decreased
d. power increased

Asmall blob of putty of mass m falls from the ceiling and lands on the outer rim of a turntable of radius r and moment of inertia i0 that is rotating freely with angular speed ω0 about its vertical fixed-symmetry axis. (use any variable or symbol stated above as necessary.)

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)

Select the three ways that the parallel-plate capacitor differs from a car battery.