Two bullets have masses of 3,0 g and 6.0g, respectively. both are fired with a speed of 40.0 m/s. which bullet has more kinetic energy? what is the ratio of their kinetic energies

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards