Athin, very light wire is wrapped around a drum that is free to rotate. the free end of the wire is attached to a ball of mass m. the drum has the same mass m. its radius is r and its moment of inertia is i = (1/2)mr2 . as the ball falls, the drum spins. at an instant that the ball has translational kinetic energy k, what is the rotational kinetic energy of the drum?

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?

Talia is manufacturing rolls of wire for hanging pictures. she needs a material that is so that it can easily be pulled into wire without breaking.

Awave that is traveling fast can be said to have a high a. frequency b. speed c. wavelength d. amplitude e. period f. none of these