reviews the concepts that are involved in this problem. A child is twirling a 0.0275-kg ball on a string in a horizontal circle whose radius is 0.102 m. The ball travels once around the circle in 0.665 as. (a) Determine the centripetal force acting on the ball. (b) If the speed is doubled, by what factor does the centripetal force increase

volts times amps 6 x 0.5 3w

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