What does the author explain in this passage? Question 2 options:

The author explains the importance of bike safety, using helmets as an example.

The author explains the force of friction, using different kinds of music as examples.

The author explains the sport of soccer, using examples of current teams and players.

The author explains the idea of motion, using different sports as examples.

Need in all of themmm only answer if you know plsssss

The softest and hardest minerals are: softest hardest

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?