Using the same muscular force, a karate chop with the side of the hand will point hurt more than a hit with the open hand because
the contact surface area is smaller with the karate blow
the karate fighter is small but hits horden
there are more bones in the side of the hand than the open hand

Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.

First to answer will be the brainliest i need the answer asap

If we decrease the amount of force and keep all other factors the same what will happen to the amount of work