Human reaction time is usually greater than 0.10 s. If your friend holds a ruler between your
fingers and releases it without warning, how far
can you expect the ruler to fall before you catch it?

and 1and 1

conduction, convection, radiation

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

access to city

explanation: