The rain has just stop and your father asked you to roll up the lona/trapal that covers your windows. What is the first thing that you should do to ensure that the pulley system works well?​

explanation:

a fuel engine ( known as a gasoline engine in american english )is an internal combustion engine with spark ignition, designed to run on petrol (gasoline) and similar volatile fuels.

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

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

there are no contact forces mentioned on the list of choices that you've provided.