A hoop rolls with constant velocity and without sliding along level ground. Its rotational kinetic energy is: four times its translational kinetic energy half its translational kinetic energy one-third its translational kinetic energy twice its translational kinetic energy the same as its translational kinetic energy

How is the ideal mechanical advantage of a wheel and axle calculated?

Zamir and talia raced through a maze. zamir walked 2 m north, 2 m east, 4 m south, 2 m east, 4 m north, 2 m east, 3 m south, 4 m east and 4 m north. talia walked 2 m north, 6 m east, 3 m south, 4 m east, and 4 m north. compare their displacements: zamir's displacement is talia's displacement.

The volume of a right circular cylinder can be approximated as follows: volume = ? r2h; where r is the radius of the cylinder and h is the height of the cylinder; ? is a constant that is roughly equal to 3. using the simple approximation above, calculate the volume of a right circular cylinder with a radius of 2 meters and a height of 7 meters