Please help
physics work

it about 600 mph from what i calculated

more than, less

less than, more

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.

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