Two charges are placed on the x-axis: a positive charge of 2.0C at 2 = 50cm and a negative charge of 7.0°C at I = 80cm. Find a point from the origin where E=0.
O a. 0.345 m
O b. 0.148 m
O c.0.155 m
O d. 0.423 m

answer; /// the above statement is (true);

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

the answer is 100. i just did this lesson and got a 100% on it. : )

-fishtank