A particle moves in a circle with radius 10 cm and with a uniform speed 1.3 m/s. What is the centripetal acceleration of this particle

it doesn't. it was imagined up in the middle ages.

measuring things 1 litre of water

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