sci 207 snhu Thermal shielding tiles on the wing were damaged at takeoff, but presented no problems through the mission until low-level reentry. Why is this so?

This is because there is no problem of heating up of the atmosphere around the shuttle at takeoff, but on low-level reentry, the atmosphere around the shuttle is heated up.

Explanation:

When a rocket takes off, it is relatively travelling at a lower speed at low-level atmosphere where the atmosphere is densest. This slow speed means that the air drag on the shuttle is not too much that the air is compressed and heated up. The result is that not much atmospheric heating is encountered, as the rocket's speed accelerates slowly and is only very fast at high-level atmosphere where the air is thinnest.

For low-level reentry, the shuttle is accelerated from outer space, under the influence of gravity, and has reached a sufficiently high speed at low-level atmosphere where the air is densest. At this level, the atmosphere immediately in front of the shuttle is greatly compressed. The effect is that the compressed atmosphere becomes exceedingly hot, and ignites into a burning flame in front of the shuttle. At this stage, the thermal shielding tiles on the wings of the shuttle is very important, and a damaged tile that was no problem on takeoff becomes a problem at this stage.

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

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle