Rotational kinetic energy <span>is the kinetic energy of an object, proportional to the object's moment of inertia and the square of its angular velocity.</span>
Also 4 sec. Without air resistance, all objects fall with the same acceleration, and reach bottom in the same amount of time.
Answer:
2.a.i think it's heat and kinetic
2.b.i think kinetic
Radial acceleration is a=v^2/r. For circular motion, the tangential velocity is v=2pi*r*f.
f is in Hz so 49/60=0.81667Hz.
radius in meters is 0.38m
So a=(2pi*f)^2*r = 10m/s^2