An observer at the origin of his reference frame (o) notes two flashes of light, a and b, spatially separated by 2400m occur along the positive x-axis of his reference frame. the a flash occurs first, followed after 5.0 micro-s by the b flash. a second observer (o') sees the two flashes at the same of the speed of light c)?

f=ma newton's second law 7x8=56n

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

pretty sure it's false