A volcano shoots old blobs of molten lava called lava bombes from its summit. A geologist observing the irruption uses a stopwatch to time the flight of a particular lava bomb that is projected straight upwards. If the time for the bomb to rise and fall back to its launch height is 4.75 s, and it’s acceleration is 9.8 m/s^2 downward, what is its initial speed?

do you have a formula possibly

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

1 is a answer of a question

use photo math tells u all the answers thats what i use