John can throw a ball with a force of 750N causing it to accelerate at 500m/s2. What is the mass of the ball he threw?

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?

Diverging mirrors and lenses always produce images

Why do some scientists and archeologists think that volta was not the first person to build a battery