john is pushing a wheelbarrow filled with sand on a building site the total mass of the wheelbarrow and it's content is 30kg when he applies a force of 20N the wheelbarrow moves forward at a constant speed, what is the magnitude of the friction between the wheel and the ground and the foreman shouts at john to hurry up and he increases his pushing force of 50N calculate the wheelbarrow acceleration​

i would like to make dinner for my mom, dad, and sister

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.

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

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