Un niñno empuja una caja al aplicarle una fuerza horizontal de 8 N. Una fuerza de friccion cinetica actua sobre la caja con una magnitud de 5 N cuando ´esta es arrastrada 0.7 m por el piso, ¿cuales son (a) el trabajo realizado por la fuerza aplicada por el niño y (b) el aumento en energıa termica de la caja y el piso?

if you answer my question i will answer yours

i don’t know what the answer is i wish i

hi,

what occurs during a solar eclipse?

there are small tides across earth.

the moon is between earth and the sun.

p.s. im not sure if the first answer is correct because during a solar ecliphse there are spring tides and i dont know if they are the same.

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